$NetBSD: acronyms.comp,v 1.413 2025/09/01 16:21:56 jschauma Exp $

$NetBSD: acronyms.comp,v 1.413 2025/09/01 16:21:56 jschauma Exp $
3WHS three-way handshake
8VSB 8-state vestigial side band modulation
AA anti-aliasing
AAA authentication, authorization, [and] accounting
AAT average access time
ABE attribute-based encryption
ABI application binary interface
ABNF augmented backus-naur form
ABR available bit rate
ABRT automatic bug reporting tool
AC alternating current
ACI adjacent channel interferer
ACID atomicity, consistency, isolation, durability
ACK Amsterdam compiler kit
ACK acknowledgement
ACL access control list
ACL active current loop
ACL asynchronous connection less
ACP auxiliary control {process,program}
ACPI advanced configuration and power interface
ACS access control set
ACU automatic calling unit
ADB Apple desktop bus
ADC analog [to] digital converter
ADD acronym driven development
ADDDC adaptive double DRAM device correction
ADO active data objects
ADP automatic data processing
ADPCM adaptive differential pulse code modulation
ADS alternate data stream
ADSL asymmetric digital subscriber line
ADT abstract data type
AEAD authenticated encryption with associated data
AEDC advanced error detection and correction
AER advanced error reporting
AES Advanced Encryption Standard
AFP Apple Filing Protocol
AFS Andrew File System
AGC automatic gain control
AGP accelerated graphics port
AI analog input
AI artificial intelligence
AL access list
AL active link
ALE address latch enable
ALPN application-layer protocol negotiation
ALS ambient light sensor
ALSA advanced Linux sound architecture
ALU arithmetic and logical unit
ALUA asymmetric logical unit access
AM access method
AM alignment mask
AM amplitude modulation
AMD Advanced Micro Devices Inc
AMDD Agile model-driven development
AMI alternate mark inversion
AMP asymmetric multiprocessing
AMQP advanced message queuing protocol
AMT active management technology
AN Arabic number
ANR application not responding
ANSI American National Standards Institute
AO analog output
AOC add-on card
AOL Alert-on-LAN
AOS add or subtract
AOT ahead of time
AP access point
AP application processor
APEI ACPI platform error interface
APFS Apple file system
API application programming interface
APIC advanced programmable interrupt controller
APIPA automatic private IP addressing
APM advanced power management
APM application performance management
APT advanced persistent threat
APU accelerated processing unit
AQM active queue management
ARAT always running APIC timer
ARC Advanced RISC Computing
ARC adaptive replacement cache
ARC automatic reference counting
ARM Advanced RISC Machines
ARP Address Resolution Protocol
ARPA Advanced Research Projects Agency
ARQ automatic repeat request
ARR address range register
ARU audio response unit
AS autonomous system
ASA Adaptive Security Appliance
ASAN Address Sanitizer
ASC advanced smart cache
ASCII American Standard Code for Information Interchange
ASD agile software development
ASE advanced software environment
ASF alert standard format
ASIC application-specific integrated circuit
ASK amplitude shift keying
ASLR address space layout randomization
ASN autonomous system number
ASP active server pages
ASP auxiliary storage pool
ASPM active state power management
ASQ automated software quality
ASR Apple software restore
ASR address space register
AST abstract syntax tree
AST asynchronous system trap
AT access time
AT advanced technology
ATA advanced technology attachment
ATAPI advanced technology attachment packet interface
ATC address translation cache
ATF ARM trusted firmware
ATF automated testing framework
ATM asynchronous transfer mode
ATX advanced technology extended
AV anti virus
AVB audio video bridging
AVL Adelson-Velsky-Landis
AVX advanced vector extensions
AWDL Apple wireless direct link
BA byte align
BAL basic assembly language
BAR base address register
BBS bulletin board system
BCC blind carbon copy
BCD binary coded decimal
BCH boot console handler
BCR byte count register
BCS base configuration space
BD baud
BDD binary decision diagram
BDI bit deinterleave
BDUF big design up front
BEDO burst extended data output
BER basic encoding rules
BER bit error {rate,ratio}
BERT boot error record table
BFD bidirectional forwarding detection
BFD binary {file,format} descriptor
BFKL big fscking kernel lock
BFS breadth-first search
BFT binary file transfer
BGA ball grid array
BGP Border Gateway Protocol
BGPSEC BGP Security
BIND Berkeley Internet Name Daemon
BIOS Basic Input/Output System
BIOS built-in operating system
BIST built-in self-test
BIU bus interface unit
BKDG BIOS and kernel developer's guide
BLAS basic linear algebra subprograms
BLC back light control
BLE Bluetooth low energy
BLOB binary large object
BM bus master
BMC baseboard management controller
BMIC bus master interface controller
BMP basic multilingual plane
BMP bitmap image file
BN boundary neutral
BNF Backus-Naur form
BO binary output
BOF beginning of file
BOM beginning of message
BOM byte order mark
BP base pointer
BP boot processor
BPB BIOS parameter block
BPDU bridge protocol data unit
BPF Berkeley Packet Filter
BPI bits per inch
BPM business process modelling
BPS bits per second
BPSK binary phase shift keying
BQP bounded-error quantum polynomial time
BQS Berkeley quality software
BRE basic regular expression
BS backspace
BS binary sequence
BSA basic service area
BSD Berkeley Software Distribution
BSDP Boot Service Discovery Protocol
BSF bit scan forward
BSOD blue screen of death
BSP binary space partition
BSP board support package
BSP bootstrap processor
BSR bit scan reverse
BSS basic service set
BSS block started by symbol
BSSID basic service set identifier
BT BitTorrent
BT Bluetooth
BT bit test
BTB branch target buffer
BTB board-to-board
BTC bit test [and] complement
BTM bus transport mechanism
BTR bit test [and] reset
BTS bit test [and] set
BTS bug tracking system
BUAG big ugly ASCII graphic
BW bandwidth
BWM block-write mode
CA certificate authority
CAC cryptographic access control
CACLS change access control lists
CAD computer-aided design
CAM computer assisted manufacturing
CAM conditional access module
CAM content addressable memory
CAN controller area network
CARP Common Address Redundancy Protocol
CAS column address strobe
CAS compare and swap
CAS computer algebra system
CASE computer aided software engineering
CAU control access unit
CAV constant angular velocity
CBC cipher block chaining
CBR constant bit rate
CC carbon copy
CCC Chaos Computer Club
CCD charge coupled device
CCI co-channel interferer
CCNUMA cache-coherent non-uniform memory access
CCTL command completion time limit
CD cache disable
CD compact disc
CDDA compact disc digital audio
CDL compiler description language
CDMA code division multiple access
CDN content delivery network
CDP Cisco Discovery Protocol
CDRAM cache dynamic random access memory
CE customer edge
CER canonical encoding rules
CERT computer emergency response team
CET control flow enforcement technology
CF compact flash
CFB cipher feedback
CFG context-free grammar
CFG control-flow graph
CFI control-flow integrity
CFRG Crypto Forum Research Group (IRTF)
CG control gate
CGA Color Graphics Adapter
CGI common gateway interface
CGN Carrier-Grade NAT
CHAP Challenge-Handshake Authentication Protocol
CHFS chip file system
CHS cylinder/head/sector
CI continuous integration
CI {common,component} interface
CIA confidentiality, integrity, availability
CIDR Classless Inter-Domain Routing
CIF common intermediate format
CIFS Common Internet File System
CIL common intermediate language
CIR carrier-to-interference ratio
CIS contact image sensor
CISC complex instruction set {computer,computing}
CJK Chinese, Japanese, [and] Korean
CLF common log format
CLI command line interface
CLI common language infrastructure
CLR common language runtime
CLS common language specification
CLTT closed loop thermal throttling
CLUT color look-up table
CLV constant linear velocity
CM configuration management
CMA concert multithread architecture
CMC certificate management over CMS
CMC chassis management controller
CMC corrected machine check
CMI control {management,method} interface
CMOS complementary metal-oxide-semiconductor
CMP chip multi-processing
CMS content management system
CMS cryptographic message syntax
CMS {configuration,content,course} management system
CMYK cyan magenta yellow black
CN {common,canonical} name
CNA CVE Numbering Authority
CNC computer numerical control
CNR carrier-to-noise ratio
COA change of authority
COF current operating frequency
COFDM coded orthogonal frequency division multiplexing
COFF common object file format
COM component object model
COM computer on module
COMA cache-only memory architecture
CORBA common object request broker architecture
COS class of service
COW copy-on-write
CP continuous pilot
CPA chosen-plaintext attack
CPB core performance boost
CPC central processor complex
CPC cpu performance counters
CPE common phase error
CPE common platform enumeration
CPER common platform error record
CPG clock pulse generator
CPI cycles per instruction
CPL current privilege level
CPLD complex programmable logic device
CPP C preprocessor
CPS characters per second
CPS continuation-passing style
CPT command pass through
CPU central processing unit
CR carriage return
CRC cyclic redundancy check
CRDT conflict-free replicated data type
CRL carrier recovery loop
CRLF carriage return line feed
CRQC cryptanalytically relevant quantum computer
CRT cathode ray tube
CRTP curiously recurring template pattern
CRUD create, read, update, and delete
CS cable select
CS chip select
CS code segment
CS computer science
CSDL {common,conceptual} schema definition language
CSI channel state information
CSI common system interface
CSIRT computer security incident response team
CSMA carrier sense multiple access
CSMA/CA carrier sense multiple access with collision avoidance
CSMA/CD carrier sense multiple access with collision detection
CSP communicating sequential processes
CSP constrain satisfaction problems
CSP content security policy
CSP cryptographic service provider
CSPM cloud security posture management
CSR control [and] status registers
CSRF cross-site request forgery
CSRG Computer Systems Research Group
CSS cascading style sheets
CST common spanning tree
CSU C start up
CSV comma-separated values
CTF compact c type format
CTM close to metal
CTR counter [mode]
CTS clear to send
CTS common type system
CUA common user access
CUT coordinated universal time
CV control voltage
CVE common vulnerabilities and exposures
CVS Concurrent Versions System
CVSS Common Vulnerability Scoring System
DA destination address
DAA distributed application architecture
DAAP digital audio access protocol
DAB digital audio broadcasting
DAC digital [to] analog converter
DAC discretionary access control
DAD duplicate address detection
DAE deterministic authenticated encryption
DANE DNS-based Authentication of Named Entities
DAO disk at once
DAP Directory Access Protocol
DAT digital audio tape
DAT dynamic acceleration technology
DB database
DBA database administrator
DBA dynamic bandwidth allocation
DBB data bus buffer
DBC design by contract
DBL dynamic buffer limiting
DBMS database management system
DBS database server
DC data center
DC direct current
DCC Direct Client-to-Client
DCC direct cable connect
DCD data carrier detect
DCE data control equipment
DCE distributed computing environment
DCIM data center infrastructure management
DCIM digital camera images
DCL Digital Command Language
DCOM distributed component object model
DCOP Desktop COmmunication Protocol
DCS data collection systems
DCT discrete cosine transform
DCU data cache unit
DDC display data channel
DDE dynamic data exchange
DDI device drivers interface
DDK device driver kit
DDL data description language
DDR double data rate
DDS direct digital sound
DDWG Digital Display Working Group
DE debugging extensions
DE desktop environment
DEA data encryption algorithm
DEC Digital Equipment Corporation
DEK data encryption key
DEP data execution prevention
DER distinguished encoding rules
DES Data Encryption Standard
DF don't fragment
DFA deterministic finite automaton
DFC data flow control
DFS depth first search
DFS distributed file system
DFSAN Data Flow Sanitizer
DFT diagnostic function test
DFT discrete Fourier transform
DFZ default-free zone
DGEMM double precision general matrix multiply
DGL data generation language
DH Diffie-Hellman
DHCP Dynamic Host Configuration Protocol
DIA dedicated Internet access
DIB device independent bitmap
DIFS distributed inter-frame space
DIMM dual inline memory module
DIRT design in real time
DKI driver/kernel interface
DL diode logic
DL discrete logarithm
DL download
DLCI data link connection identifier
DLE data link escape
DLL dynamic link library
DLNA digital living network alliance
DLP discrete logarithm problem
DMA direct memory access
DMB data memory barrier (Arm)
DMI desktop management interface
DMS document management system
DMT discrete multitone modulation
DMU data management layer
DNARD Digital network appliance reference design
DND drag and drop
DNLC directory name lookup cache
DNS Domain Name System
DNSBL Domain Name System Block List
DNSSEC DNS Security Extensions
DOE distributed object environment
DOF data over fibre
DOH DNS over HTTPS
DOM document object model
DOQ DNS over QUIC
DOS denial of service
DOS disk operating system
DOT DNS over TLS
DP DisplayPort
DPAA data path acceleration architecture
DPC deferred procedure call
DPCM differential pulse code modulation
DPD dead peer detection
DPDK data plane development kit
DPI deep packet inspection
DPI dots per inch
DPL descriptor privilege level
DPS Display PostScript
DPST display power savings technology
DRAAS disaster recovery as a service
DRAM dynamic random access memory
DRBG deterministic random bit generator
DRI direct rendering infrastructure
DRM digital rights management
DRM direct rendering manager
DRN Discovery of Network-designated Resolvers
DRRS display refresh rate switching
DS debug store
DS differentiated services
DS delegation signer
DS9000 DeathStation 9000
DS9K DeathStation 9000
DSA digital signature algorithm
DSAP destination service access point
DSB data synchronization barrier (Arm)
DSB double-sideband modulation
DSCP differentiated services code point
DSDT differentiated system descriptor table
DSF device special file
DSL dataset and snapshot layer
DSL digital subscriber line
DSL domain specific language
DSLAM digital subscriber line access multiplexer
DSN delivery status notification
DSO dynamic shared object
DSP digital signal processor
DSSS direct sequence spread spectrum
DTB device tree blob
DTC device tree compiler
DTD document type definition
DTE data terminal equipment
DTE dumb terminal emulator
DTL diode-transistor logic
DTLS datagram transport layer security
DTS device tree source
DTS digital thermal sensor
DUT device under test
DVB digital video broadcasting
DVCS distributed version control system
DVD digital versatile disc
DVFS dynamic voltage and frequency scaling
DVI Digital Visual Interface
DVI device independent
DVR digital video recorder
DWARF Debugging With Attributed Record Formats
E-XER extended XML encoding rules
EABI embedded-application binary interface
EAI Email Address Internationalization
EAI Enterprise Application Integration
EAP Extensible Authentication Protocol
EAPOL EAP over Lan
EAV entity-attribute-value model
EAV ethernet audio/video bridging
EBCDIC Extended Binary Coded Decimal Interchange Code
EBDA Extended BIOS Data Area
EBNF extended backus-naur form
EBR extended boot record
EC elliptic curve
ECC elliptic curve cryptography
ECC error correction code
ECDH elliptic curve Diffie-Hellman
ECDL elliptic curve discrete logarithm
ECDLP elliptic curve discrete logarithm problem
ECDSA elliptic curve digital signature algorithm
EDDSA Edwards-curve digital signature algorithm
ECL emitter-coupled logic
ECN explicit congestion notification
ECP enhanced capability port
ECS enhanced chip set
ECS extended configuration space
EDAC error detection and correction
EDAT enhanced dynamic acceleration technology
EDGE explicit data graph execution
EDID extended display identification data
EDO extended data out
EDS electronical data sheet
EDSAC electronic delay storage automatic calculator
EDVAC electronic discrete variable automatic computer
EEE embrace, extend, extinguish
EEE energy efficient ethernet
EEPROM electrically erasable programmable read only memory
EFI extensible firmware interface
EFL emitter follower logic
EFM eight to fourteen modulation
EFS extent file system
EGA Enhanced Graphics Adapter
EGP exterior gateway protocol
EH extension header
EIDE enhanced IDE
EINJ error injection table
EISA extended industry standard architecture
EKU extended key usage (x509)
ELF executable and linking format
ELS entry level system
EMACS Editor MACroS
EMI electro-magnetic interference
EMP electro-magnetic pulse
EMR electro-magnetic radiation
EMS extended master secret (RFC7627)
ENIAC electronic numerical integrator and computer
EOF end of file
EOI end of interrupt
EOIS end of interactive support
EOL end of life
EOL end of line
EOT end of transmission
EPIC explicitly parallel instruction computing
EPP enhanced parallel port
EPP extensible provisioning protocol (RFC5730)
EPRML extended partial response, maximum likelihood
EPROM erasable programmable read only memory
EPSS Exploit Prediction Scoring System
EPT extended page tables
ERC error recovery control
ERD emergency recovery disk
ERD entity relationship diagram
ERE extended regular expression
ERST error record serialization table
ESAN Efficiency Sanitizer
ESB enterprise service bus
ESDI enhanced small disk interface
ESDRAM enhanced synchronous dynamic random access memory
ESI enclosure services interface
ESS electronic switching system
ESS extended service set
ESSID extended service set identifier
EST enhanced speedstep
ETL extract, transform, load
EU execution unit
EULA end user license agreement
EdDSA Edwards curve digital signature algorithm
FAT file allocation table
FBL feedback loop
FBRAM frame buffer random access memory
FCIF full common intermediate format
FCL fiber channel loop
FCS frame check sequence
FDC floppy disk controller
FDD floppy disk drive
FDDI fiber distributed data interface
FDE full disk encryption
FDT flattened device tree
FEA finite element analysis
FEC forward error correction
FET field-effect transistor
FF finite field
FF form feed
FFDH finite-field Diffie-Hellman
FFH functional fixed hardware
FFI foreign function interface
FFM focus follows mouse
FFS Fast File System
FFS find first set
FFT fast Fourier transform
FG floating gate
FHE fully homomorphic encryption
FHRP first hop redundancy protocol
FHSS frequency hop spread spectrum
FID frequency identifier
FIFO first in, first out
FILO first in, last out
FIPS Federal Information Processing Standards
FIR fast infrared
FLOPS floating [point] operations per second
FLOSS free/libre/open source software
FM frequency modulation
FMR false match rate
FOSS free/open source software
FPGA field programmable gate array
FPM fast page mode
FPR floating point register
FPU floating point unit
FQDN fully qualified domain name
FRR false rejection rate
FRR Free Range Routing
FRU field replaceable unit
FS file system
FSB front side bus
FSCK file system check
FSF Free Software Foundation
FSK frequency shift keying
FSM finite-state machine
FTA fault tree analysis
FTL flash translation layer
FTP File Transfer Protocol
FTPS File Transfer Protocol Secure
FTTH fiber to the home
FUS fast user switching
FWH firmware hub
FWS folding white space
GAL generic array logic
GARP generic attribute registration protocol
GAS generic address structure
GC garbage collector
GCC GNU Compiler Collection
GCM Galois counter mode
GCR group-coded recording
GDI Graphics Device Interface
GDT global descriptor table
GDT (block) group descriptor table
GECOS general comprehensive operating supervisor
GEM graphics environment manager
GEM graphics execution manager
GEMM general matrix multiply
GENA general event notification architecture
GHC Glasgow Haskell compiler
GHES generic hardware error source
GIC generic interrupt controller
GID group identifier
GIF graphics interchange format
GLBP gateway load balancing protocol
GMCH graphics and memory controller hub
GNU GNU's Not Unix
GOP graphics output protocol
GOT global offset table
GPE general purpose event
GPF general protection fault
GPG GNU Privacy Guard
GPL [GNU] General Public License
GPR general purpose register
GPS generalized processor sharing
GPT GUID partition table
GPU graphics processing unit
GR golden ratio
GRE generic routing encapsulation
GRO generic receive offload
GSI global system interrupt
GSO generic send offload
GUA global unicast address
GUI graphical user interface
GUID globally unique identifier
GUS Gravis UltraSound
GVFS git virtual file system
HA high availability
HAL hardware abstraction layer
HAT hashed array tree
HATEOAS hypermedia as the engine of application state
HBA host bus adapter
HBS hash-based signature
HCC Home Cable Computer
HCCA Home Cable Computer Adaptor
HCF halt and catch fire
HCI host controller interface
HCI human-computer interaction
HCL hardware compatibility list
HDCP High-bandwidth Digital Content Protection
HDD hard disk drive
HDL hardware description language
HDMI High-Definition Multimedia Interface
HDTV high-definition television
HECI host embedded controller interface
HEST hardware error source table
HEVC high efficiency video coding
HF high frequency
HFM highest frequency mode
HFS hierarchical file system
HID human interface device
HKDF HMAC-based key derivation function
HKP HTTP Keyserver Protocol
HLE hardware lock elision (Intel)
HLL high-level language
HMA high memory area
HMI human-machine interface
HNDL harvest now, decrypt later
HOOD hierarchical object oriented design
HOTP HMAC-based one time password
HP Hewlett-Packard
HPC high performance computing
HPD hot plug detection
HPET high precision event timer
HPKE hybrid public key encryption
HQC Hamming Quasi-Cyclic
HSM hardware security module
HSM hierarchical storage management
HSRP hot standby router protocol
HT hyper-threading
HTC hardware thermal control
HTCC high temperature co-fired ceramic
HTML HyperText Markup Language
HTT hyper-threading technology
HTTP Hypertext Transfer Protocol
HTTPS Hypertext Transfer Protocol Secure
HVDS High-Voltage Differential Signaling
HVM hardware virtual machine
HWASAN Hardware-assisted Address Sanitizer
HZ Hertz
I2O intelligent input/output
IA information assurance
IAAS infrastructure as a service
IAB Internet Architecture Board
IANA Internet Assigned Numbers Authority
IBC iterated block cipher
IBM International Business Machines
IBPI international blinking pattern interpretation
IBS instruction based sampling
IBSS independent basic service set
IBT indirect branch tracking
IC integrated circuit
ICA independent computer architecture
ICACLS integrity control access control lists
ICB Internet Citizen's Band
ICE in-circuit emulator
ICE internal compiler error
ICH I/O controller hub
ICMP Internet Control Message Protocol
ICT information and communications technology
ICW initialization command word
IDA Intel dynamic acceleration
IDCMP Intuition direct communication message port
IDCT inverse discrete cosine transform
IDE integrated development environment
IDE integrated drive electronics
IDPS intrusion detection [and] prevention system
IDRP inter-domain routing protocol
IDS intrusion detection system
IDT interrupt descriptor table
IE Internet Explorer
IEC International Electrotechnical Commission
IEEE Institute of Electrical and Electronics Engineers
IESG Internet Engineering Steering Group
IETF Internet Engineering Task Force
IF intermediate frequency
IFCM isochronous flow control mode
IFF Interchange File Format
IFS internal field separator
IGD Internet gateway device
IGMP Internet Group Management Protocol
IGP interior gateway protocol
IHV independent hardware vendor
IKE Internet key exchange
IKM input keying material
ILM internal loopback mode
ILOM integrated lights-out management
ILP instruction level parallelism
IM instant messaging
IMAP Internet Message Access Protocol
IMC integrated memory controller
IMCR interrupt mode configuration register
IME input method editor
IMR interrupt mask register
IMS information management system
IMSI international mobile subscriber identity
INCITS InterNational Committee for Information Technology Standards
INODE index node
IO input/output
IOCTL input/output control
IOM input/output managers
IOMMU input/output memory management unit
IOT Internet of Things
IP Internet Protocol
IP intellectual property
IPC instructions per cycle
IPC interprocess communication
IPCF interprocess communication facility
IPE integrated programming environment
IPI intelligent peripheral interface
IPI interprocessor interrupt
IPL Initial Program Load
IPL Interrupt Priority Level
IPMB Intelligent Platform Management Bus
IPMI Intelligent Platform Management Interface
IPNG Internet Protocol, Next Generation
IPS in-plane switching
IPS intrusion prevention system
IPSEC Internet Protocol Security
IR intermediate representation
IRC Internet Relay Chat
IRDA infrared data association
IRDP ICMP Router Discovery Protocol
IRQ interrupt request
IRQL interrupt request level
IRR interrupt request register
IRTF Internet Research Task Force
IS information system
ISA industry standard architecture
ISA instruction set architecture
ISB instruction synchronization barrier (Arm)
ISDN integrated services digital network
ISE instant secure erase
ISI inter-symbol interference
ISL initial system load
ISM industrial, scientific, [and] medical
ISMS information system management system
ISN initial serial number
ISO International Standards Organization
ISOC Internet Society
ISP Internet service provider
ISR in-service register
ISR interrupt service routine
IST internal spanning tree
IST interrupt stack table
ISV independent software vendor
IT information technology
ITB Intel Turbo Boost
ITIL information technology infrastructure library
ITP in-target probe
ITSM IT service management
IV initialization vector
IVT interrupt vector table
JBOD just a bunch of disks
JCL Job Control Language
JFET junction [gate] field-effect transistor
JIT just in time
JPEG Joint Photographic Experts Group
JRE Java Runtime Environment
JSON JavaScript Object Notation
JTAG joint test action group
KASAN Kernel Address Sanitizer
KASLR kernel address space layout randomization
KB keyboard
KB kilobyte
KBD keyboard
KBD kilobaud
KCS keyboard controller style
KDF key derivation function
KEK key encryption key
KEM key encapsulation mechanism
KLOC thousand lines of code
KMS kernel-mode setting
KPI kernel programming interface
KSK key signing key
KVA kernel virtual address
KVM kernel virtual machine
KVM kernel virtual memory
KVM keyboard, video, [and] mouse
L2CAP link layer control and adaptation protocol
L4S Low Latency, Low Loss and Scalable Throughput (RFC9330)
LAG link aggregation group
LAMP Linux Apache MySQL {Perl,PHP,Python}
LAN local area network
LAPIC local advanced programmable interrupt controller
LAR load access rights
LBA logical block addressing
LBNF labeled backus-naur form
LBS location-based service
LCD liquid crystal display
LCP link control protocol
LDA local delivery agent
LDAP Lightweight Directory Access Protocol
LDR light-dependent resistor
LDT local descriptor table
LE logical extent
LED light emitting diode
LELL low energy link layer
LER label edge router
LF line feed
LF low frequency
LFM lowest frequency mode
LFN long file names
LFO low-frequency oscillation
LFS log-structured file system
LFU least frequently used
LHP loop heat pipe
LIF logical interchange format
LIFO last in, first out
LILO LInux LOader
LILO last in, last out
LINT local interrupt
LIR local Internet registry
LISP LISt Processor
LISP Locator/ID Separation Protocol
LKM {Linux,loadable} kernel module
LKML Linux kernel mailing list
LL load linked
LL/SC load linked/store conditional
LLC logical link control
LLD low-level design
LLDD low-level design document
LLDP link layer discovery protocol
LLF low level format
LLMNR link-local multicast name resolution
LLVM Low Level Virtual Machine
LM long mode
LMCE local machine check exception
LMI local management interface
LMM link management mode
LMP link management protocol
LMS Leighton-Micali Signature
LNO loop nest optimization
LOC lines of code
LOM lights-out management
LPC low pin count
LPE Linux performance events
LPS local positioning system
LRC longitudinal redundancy check
LRM left-to-right mark
LRO Large Receive Offload
LRO left-to-right override
LRU least recently used
LS link state
LSAN Leak Sanitizer
LSB Linux standards base
LSB least significant {bit,byte}
LSI large scale integration
LSL load segment limit
LSM log structured merge
LSN Large Scale NAT
LSN log sequence number
LSO large send offload
LSR label switch router
LTCC low temperature co-fired ceramic
LTO linear tape-open
LTO link time optimization
LTR left to right
LTR letter(-sized paper)
LTR load task register
LTS long term support
LUA Lua Uppercase Accident
LUN logical unit number
LV logical volume
LVDS Low-Voltage Differential Signaling
LVM logical volume management
LVT local vector table
LWP light-weight process
LZSS Lempel Ziv Storer Szymanski
LZW Lempel Ziv Welch
MAB MAC authentication bypass
MAC mandatory access control
MAC message authentication {check,code}
MAC {media,medium} access control
MADT multiple APIC descriptor table
MAMR microwave-assisted magnetic recording
MB megabyte
MBA multi-boot agent
MBR master boot record
MBS megabits per second
MC memory controller
MCA MicroChannel architecture
MCA machine check architecture
MCC multiversion concurrency control
MCE machine check exception
MCGA Multi-Color Graphics Array
MCH memory controller hub
MCLAG multi-chassis link aggregation group
MCM multi-chip module
MCQ memory controlled queue
MD MiniDisc
MD machine-dependent
MD-SAL model-driven service abstraction layer
MDA Monochrome Display Adapter
MDA mail delivery agent
MDC Management Data Clock
MDI Medium Dependent Interface
MDI-X Medium Dependent Interface Crossover
MDIO Management Data Input/Output
MDMX MIPS Digital Media eXtension
MDRAM multibank dynamic random access memory
MDS microarchitectural data sampling
MESI modified, exclusive, shared, invalid
MFC Microsoft Foundation Classes
MFC merge from current
MFM modified frequency modulation
MFU most frequently used
MGCP media gateway control protocol
MHU message handling unit
MI machine interface
MI machine-independent
MIB management information base
MIC message integrity {check,code}
MID mobile Internet device
MIDI musical instrument digital interface
MIF management information format
MII media independent interface
MIM man in the middle
MIMD multiple instruction, multiple data
MIME Multipurpose Internet Mail Extensions
MIMO multiple input multiple output
MIPS Microprocessor without Interlocked Pipeline Stages
MIPS million instructions per second
MISD multiple instruction, single data
MIT Massachusetts Institute of Technology
MITM man in the middle
ML machine language
ML machine learning
ML mailing list
ML markup language
ML maximum likelihood
ML-KEM module-lattice based key-encapsulation mechanism
MLAG multi-chassis link aggregation group
MLC multi-level cell
MLD multicast listener discovery
MLHP micro loop heat pipe
MLIR multi-level intermediate representation
MLO MMC loader
MMC multi-media card
MMF multi-mode fiber
MMIC monolithic microwave integrated circuit
MMIO memory mapped input/output
MMORPG massive multiplayer online role playing game
MMRP multiple MAC registration protocol
MMU memory management unit
MMX matrix math extension
MMX multimedia extension
MMX multiple math extension
MO magneto-optical
MOESI modified, owned, exclusive, shared, invalid
MOF maximum operating frequency
MOSFET metal-oxide-semiconductor field-effect transistor
MOSI modified, owned, shared, invalid
MP multi-platform
MP multiplayer
MP {multiprocessing,multiprocessor}
MPEG moving picture experts group
MPI message passing interface
MPLS Multiprotocol Label Switching
MPP massively parallel processor
MPS memory pool system
MPS multiprocessor specification
MQTT Message Queuing Telemetry Transport
MR modem ready
MRO method resolution order
MRP multiple registration protocol
MRU most recently used
MS Microsoft
MSAN Memory Sanitizer
MSB most significant {bit,byte}
MSC message sequence chart
MSE mean square error
MSF minutes seconds frames
MSI message signaled interrupt
MSI modified, shared, invalid
MSR {machine state,model-specific} register
MSS maximum segment size
MSTP Multiple Spanning Tree Protocol
MT machine translation
MTA mail transfer agent
MTBF mean time between failures
MTP media transfer protocol
MTRR memory type range register
MTTF mean time to failure
MTU maximum transmission unit
MUA mail user agent
MUD multi-user domain
MVCC multiversion concurrency control
MVR multicast VLAN registration
MVRP multiple VLAN registration protocol
MWE module width encoding
MX mail exchange
MZM Majorana zero mode
NACK negative acknowledgement
NAK negative acknowledgement
NAN neighbor awareness networking
NAN not a number
NAPT Network Address Port Translation
NAS network attached storage
NAT network address translation
NAV network allocation vector
NC numerical control
NC-SI network controller sideband interface
NCO numerically-controlled oscillator
NCP Network Control Protocol
NCQ native command queuing
NCSI network connectivity status indicator
ND neighbor discovery
NDFA nondeterministic finite automaton
NDIS network driver interface specification
NE numeric error
NEWS Network extensible Window System
NFA nondeterministic finite automaton
NFC near-field communication
NFCI no functional change intended
NFS network file system
NFV network function virtualization
NHACP NABU HCCA Application Communication Protocol
NIA next instruction address
NIC network information center
NIC network interface card
NIDS network intrusion detection system
NIKE Non-Interactive Key Exchange
NIP network interface protocol
NIPR non-classified IP router (network)
NIPS network intrusion prevention system
NIS network information service
NIST National Institute of Standards and Technology
NLS native language support
NMI non-maskable interrupt
NMR nonce-misuse resistance
NNTP Network News Transfer Protocol
NOC network operations center
NOP no operation
NOS network operating system
NP nondeterministic polynomial time
NRND not recommended for new designs
NRZ non-return to zero
NSA National Security Agency
NSA nation-state adversary
NSA no such agency
NTA negative trust anchor
NTM non-deterministic Turing machine
NTP Network Time Protocol
NUMA non-uniform memory access
NURBS non-uniform rational basis spline
NVD National Vulnerability Database
NVMM NetBSD Virtual Machine Monitor
NVMM non-volatile main memory
NVRAM non-volatile random access memory
NW not write-through
NX no execute
OAEP optimal asymmetric encryption padding
OAM operations, administration, and {management,maintenance}
OBO off by one
OBOE off by one error
OCL object constraint language
OCR optical character recognition
ODBC Open Database Connectivity
ODCM on-demand clock modulation
ODE offline device environment
ODI open data-link interface
ODM object data manager
ODMR on-demand mail relay
ODT on-die termination
OEM original equipment manufacturer
OFB output feedback
OFDM orthogonal frequency division multiplexing
OFET organic field-effect transistor
OLAP online analytical processing
OLE object linking and embedding
OLTP online transaction processing
ONCE on-{chip,circuit} emulation
ONFI open nand flash interface
OO OpenOffice
OO object oriented
OOB out of band
OOE out of order execution
OOM out of memory
OOO OpenOffice.org
OOP object oriented programming
OOPS object oriented programming systems
OOSE object oriented software engineering
OPM operations per minute
OPS operations per second
OQL Object Query Language
ORB object request broker
ORM object-relational mapping
OS operating system
OSD object-based storage device
OSD open source definition
OSF open software foundation
OSI Open Source Initiative
OSI open systems interconnection
OSPF open shortest path first
OSPM OS power management
OSS open sound system
OSS open source software
OSVW operating system visible workarounds
OTP one time password
OTP open telecom platform
OU organizational unit
OUI organizationally unique identifier
OWASP Open Web Application Security Project
OWL Web Ontology Language
P2P PCI to PCI
P2P peer to peer
PA phase accumulator
PA physical address
PAAS platform as a service
PAC phase-amplitude converter
PAE physical address extension
PAGP port aggregation protocol
PAL phase alternating line
PAL programmable array logic
PAM pluggable authentication modules
PAM pulse amplitude modulation
PAP password authentication protocol
PAT page attribute table
PAT port address translation
PATA parallel ATA
PAX portable archive exchange
PBE pending break encoding
PBE programming by example
PBKDF password-based key derivation function
PBR partition boot record
PBX private branch exchange
PC personal computer
PC program counter
PCB Protocol Control Block
PCB printed circuit board
PCB process control block
PCBC propagating cipher block chaining
PCC Portable C Compiler
PCD page-level cache disable
PCE path computation element
PCE performance-monitor counter enable
PCEP Path Computation Element Protocol
PCH platform controller hub
PCI peripheral component interconnect
PCM phase change memory
PCM pulse code modulation
PCMCIA Personal Computer Memory Card International Association
PCP Port Control Protocol
PCR Platform Configuration Register
PD public domain
PDA personal digital assistant
PDA pushdown automaton
PDAG propositional directed acyclic graph
PDB power distribution board
PDF portable document format
PDM pulse-duration modulation
PDN pull-down network
PDP page {descriptor,directory} page
PDS product data sheet
PDU protocol data unit
PE portable executable
PE protection enable
PE provider edge
PEAP Protected EAP
PECI platform environment control interface
PED PIN Entry Device
PEP protocol extension protocol
PER packed encoding rules
PFS perfect forward secrecy
PGAS partitioned global address space
PGE page global enable
PGO profile guided optimization
PGP Pretty Good Privacy
PHB PCI host bridge
PHP PHP: Hypertext Preprocessor
PIC performance instrumentation counters
PIC position independent code
PIC programmable interrupt controller
PICNIC problem in chair, not in computer
PID process id
PIE position independent executable
PIL Priority Interrupt Level
PIM personal information manager
PIM platform-independent model
PIO programmed input/output
PIPT physically indexed, physically tagged
PIQ prefetch input queue
PIR private information retrieval
PIT programmable interrupt timer
PIV personal identity verification
PIX Private Internet eXchange
PKCS public-key cryptography standards
PKE public key encryption
PKI public key infrastructure
PLC programmable logic controller
PLD programmable logic device
PLL phase locked loop
PLRU pseudo LRU
PLT procedure linkage table
PLTM package level thermal management
PM power management
PM {phase,pulse} modulation
PMC performance monitoring counters
PME power management event
PMEG page map entry group
PMI performance monitoring infrastructure
PMI platform management interrupt
PMIC power management integrated circuit
PMIO port-mapped input/output
PMT photo-multiplier tube
PMU performance monitoring units
PMU power management unit
PNG portable network graphics
PNP plug and play
POE power over ethernet
POF probability of failure
POP Post Office Protocol
POP power on password
POR plan of record
POSIX Portable Operating System Interface [for Unix]
POST power on self test
POTS plain old telephone system
POWER Performance Optimization With Enhanced RISC
POWERPC Performance Optimization With Enhanced RISC - Performance Computing
PP pair programming
PPB PCI [to] PCI bridge
PPC Power Performance Computing
PPC PowerPC
PPI pixels per inch
PPM pages per minute
PPP Point-to-Point Protocol
PPPOA Point-to-Point Protocol over ATM
PPPOE Point-to-Point Protocol over Ethernet
PPR processor programming reference
PPT powerpoint
PPT punched paper tape
PPU physics processing unit
PQC post-quantum cryptography
PRAM Parameter RAM
PRBS pseudorandom bit sequence
PRF pseudorandom function [family]
PRG pseudorandom generator
PRML partial response, maximum likelihood
PRN pseudorandom {noise,number}
PRNG pseudorandom number generator
PROM programmable read only memory
PRP pseudorandom permutation
PRU Programmable Realtime Unit
PS PostScript
PSD power spectral density
PSE page size extensions
PSK phase shift keying
PSK pre-shared key
PSTN public switched telephone network
PSW program status word
PTE page table entry
PTLA pseudo top level aggregator
PTP page table page
PTV perceived target value
PU processing unit
PUC personal unblocking code
PUN physical unit number
PV physical volume
PVC permanent virtual circuit
PVG physical volume group
PVI protected-mode virtual interrupt
PVRST Per-VLAN rapid spanning tree
PVST Per-VLAN Spanning Tree
PWM pulse width modulation
PXE preboot execution environment
QA quality assurance
QAM quadrature amplitude modulation
QAM quality assurance management
QBE query by example
QC quality control
QCIF quarter common intermediate format
QDI quasi delay insensitive
QOI quality of implementation
QOI quick order interface
QOS quality of service
QPU quantum processing unit
QUIC Quick UDP Internet Connections
QVL qualified vendor list
R/O read only
R/W read/write
RA receiver address
RA remote assistance
RA resource affinity
RA router advertisement
RAD rapid application development
RADIUS remote authentication dial-in user service
RAID redundant array of {independent,inexpensive} disks
RAII resource acquisition is initialization
RAM random access memory
RAS reliability, availability and serviceability
RAS remote access service
RAS restartable atomic sequence
RAS row address strobe
RAT register allocation table
RAT remote access trojan
RBF radial basis function
RBL real-time blackhole list
RBL reputation block list
RBNF routing backus-naur form
RBT red-black tree
RC release candidate
RC remote control
RC run commands
RCS Revision Control System
RCU read, copy, update
RDB Rigid Disk Block
RDBMS relational database management system
RDF Resource Description Framework
RDM relational data model
RDMA remote direct memory access
RDP remote desktop protocol
RDRAM Rambus DRAM
RE regular expression
REPL read, evaluate, print, loop
REST representational state transfer
RF radio frequency
RFB remote frame buffer
RFI radio frequency interference
RFO request for ownership
RFU reserved for future use
RGB red green blue
RGBA red green blue alpha
RGMII reduced gigabit media independent interface
RH read hit
RHEL Red Hat Enterprise Linux
RHL Red Hat Linux
RIB routing information base
RIFF Resource Interchange File Format
RIP Raster Image Processor
RIP Routing Information Protocol
RIPR releasable IP router (network)
RIR regional Internet registry
RISC reduced instruction set {computer,computing}
RKM ROM Kernel Manual
RLE run length encoding
RLL run length limited
RLO right-to-left override
RM read miss
RMCP Remote Management Control Protocol
RMI remote method invocation
RMO Relaxed Memory Ordering
RMPM rapid memory power management
RMS root mean square
RMW read, modify, write
RNG random number generator
ROA route origin authorization
ROM read only memory
ROP return-oriented programming
RPC remote procedure call
RPG Report Program Generator
RPKI resource PKI
RPL requested privilege level
RPM revolutions per minute
RPN reverse Polish notation
RPVST Rapid Per-VLAN Spanning Tree
RPZ response policy zone
RR random replacement
RR resource record
RR round robin
RRSIG resource record signature
RS relay station
RSA Rivest, Shamir, [and] Adleman
RSC Receive Segment Coalescing
RSIP Realm Specific IP
RSN Robust Secure Network
RSS Receive Side Scaling
RSS really simple syndication
RSS residual sum of squares
RSTP Rapid Spanning Tree Protocol
RT real time
RTC real time clock
RTC real time computing
RTF rich text format
RTL register transfer language
RTL resistor-transistor logic
RTL right to left
RTM restricted transactional memory (Intel)
RTOS real time operating system
RTP Real-time Transport Protocol
RTS request to send
RTT round trip time
RTTI run-time type information
RUP rational unified process
RW Rabin-Williams
RWM read-write memory
RX {receive,receiver}
S/PDIF Sony/Philips Digital Interface Format
SA security advisory
SA security association
SA source address
SA structured analysis
SAAS software as a service
SABRE Semi-automated business research environment
SACD super audio compact disc
SAD security association database
SAF-TE SCSI accessed fault-tolerant enclosure
SAGE Semi-automated ground environment
SAL {service,system} abstraction layer
SAM serial access memory
SAM sum addressed memory
SAML security assertion markup language
SAN storage area network
SAP service access point
SAPIC streamlined advanced programmable interrupt controller
SASD structured analysis, structured design
SASI Shugart Associates System Interface
SASL simple authentication [and] security layer
SATA serial advanced technology attachment
SAX simple API for XML
SB sound blaster
SBI supervisor binary interface
SBOM Software Bill of Materials
SBSA server base system architecture
SBU standard build unit
SC store conditional
SCA source code analyzer
SCADA supervisory control and data acquisition
SCC single chip cloud
SCC source code control
SCCP skinny call control protocol
SCCS Source Code Control System
SCI scalable coherent interface
SCI system control interrupt
SCIM smart common input method
SCM software configuration management
SCM source code management
SCM storage-class memory
SCO synchronous connection orientated
SCP secure copy
SCP system control processor
SCPI system control and power interface
SCSI Small Computer System Interface
SCT Signed Certificate Timestamp
SCTP Stream Control Transmission Protocol
SDDC software defined data center
SDEI software delegated exception interface
SDI symbol deinterleave
SDK software development kit
SDL Simple Declarative Language
SDL Simple Direct-media Layer
SDLC {software,system,systems} development life cycle
SDN software defined networking
SDP Session Description Protocol
SDR software defined radio
SDRAM synchronous dynamic random access memory
SDS software defined storage
SDT syntax-directed translation
SEA synchronous external abort
SED self-encrypting drive
SED stream editor
SEGV segmentation violation
SEMB serial ATA enclosure management bridge
SEO search engine optimization
SES SCSI enclosure services
SFC sequential function chart
SFI simple firmware interface
SFI software fault isolation
SFP small form-factor pluggable
SFTP SSH File Transfer Protocol
SFTP Serial File Transfer Protocol
SFTP Simple File Transfer Protocol
SGI Silicon Graphics, Inc
SGI software generated interrupt
SGMII serial gigabit media independent interface
SGPIO serial general purpose input/output
SGRAM synchronous graphics random access memory
SHA secure hash algorithm
SICP structure and interpretation of computer programs
SIDH supersingular isogeny Diffie-Hellman
SIEM security information and event management
SIF source input format
SIFS short inter-frame space
SIM subscriber identity module
SIMD single instruction, multiple data
SIMM single inline memory module
SIP Session Initiation Protocol
SIPR secret IP router (network)
SIR signal-to-interference ratio
SIR slow infrared
SIRT security incident response team
SISD single instruction, single data
SIV synthetic initialization vector
SLAAC stateless address auto-configuration
SLC single-level cell
SLDRAM synchronous-link dynamic random access memory
SLED single large expensive disk
SLI scalable link interface
SLI scan-line interleave
SLIC system license internal code
SLOC source lines of code
SLRU segmented LRU
SMA smart memory access
SMAF system management action field
SMAP Simple Mail Access Protocol
SMAP supervisor mode access prevention
SMART self-monitoring analysis and reporting technology
SMB Server Message Block
SMB system management bus
SMBIOS System Management BIOS
SMC system management controller
SMD storage module device
SMEP supervisor mode execution protection
SMF single mode fiber
SMI structure of management information
SMI system management interrupt
SMM system management mode
SMP serial management protocol
SMP symmetric multiprocessing
SMR shingled magnetic recording
SMR state machine replication
SMT simultaneous multithreading
SMTP Simple Mail Transfer Protocol
SMU system management unit
SNA systems network architecture
SNAP Sub-Network Access Protocol
SNIA Storage Networking Industry Association
SNMP Simple Network Management Protocol
SNR signal-to-noise ratio
SOA service oriented architecture
SOAP Simple Object Access Protocol
SOC security operations center
SOC system on chip
SOF start of frame
SOH start of header
SOHO small office/home office
SOL serial over LAN
SOM system on module
SP service pack
SP stack pointer
SPA storage pool allocator
SPAN switched port analyzer
SPARC scalable processor architecture
SPARQL SPARQL Protocol and RDF Query Language
SPD security policy database
SPD serial presence detect
SPDIF Sony/Philips digital interface format
SPI serial peripheral interface
SPI stateful packet inspection
SPIR standard portable intermediate representation
SPL secondary program loader
SPL spinlock
SPL system interrupt priority level
SPMD single process, multiple data
SPR special purpose register
SPT sectors per track
SQA software quality assurance
SQCIF sub quarter common intermediate format
SQL Structured Query Language
SRAM static random access memory
SRC sample rate conversion
SRP SCSI RDMA protocol
SRR shaped round robin
SRS Sender Rewriting Scheme
SRTP Secure Real-time Transport Protocol
SS self-snoop
SS stack segment
SSA static single assignment
SSAP source service access point
SSB single-sideband modulation
SSB speculative store bypass
SSBB speculative store bypass barrier (Arm)
SSBD speculative store bypass disable (Intel)
SSC spread spectrum clock
SSD solid state drive
SSE streaming SIMD extensions
SSFDC solid state floppy disc card
SSH secure shell
SSI server side includes
SSID service set identifier
SSL secure sockets layer
SSP stack smashing protection
SSRF server-side request forgery
SSTP secure socket tunneling protocol
STC software thermal control
STD state transition diagram
STEK session ticket encryption key
STM software transactional memory
STOMP Streaming Text Oriented Messaging Protocol
STP Spanning Tree Protocol
STP shielded twisted pair
STRG spanning tree root guard
SUN Stanford University Network
SUS Single Unix Specification
SUT system under test
SVC switched virtual circuit
SVG scalable vector graphics
SVGA Super Video Graphics Array
SVI {switch,switched} virtual interface
SVM secure virtual machine
SVM support vector machine
SVR System V Release
SVS Separate Virtual Space
SWF Shockwave Flash
SWIG simplified wrapper [and] interface generator
SYR symbol timing recovery
TA test assertion
TA transmitter address
TAA transactional asynchronous abort (Intel)
TACACS terminal access controller access-control system
TAI international atomic time
TAO track at once
TAOCP The Art of Computer Programming
TAP Test Anything Protocol
TAS test and set
TB terabyte
TBNF transitional backus-naur form
TCB trace capture buffer
TCB trusted computing base
TCC thermal control circuit
TCL tool command language
TCP Transmission Control Protocol
TCQ tagged command queueing
TDC time [to] digital converter
TDD test-driven development
TDD time division duplex
TDM time division multiplexing
TDMA time division multiple access
TDOA time difference of arrival
TDP thermal design {point,power}
TDR time-domain reflectometry
TECO Text Editor and Corrector
TEE Trusted Execution Environment
TFT thin film transistor
TFTP Trivial File Transfer Protocol
TIAS try it and see
TIFF tagged image file format
TITS try it to see
TK temporal key
TKIP Temporal Key Integrity Protocol
TLA top level aggregator
TLB translation lookaside buffer
TLD top level domain
TLER time-limited error recovery
TLI transport layer interface
TLS thread local storage
TLS transport layer security
TLV type, length, value
TM Turing machine
TM thermal monitor
TMDS transition minimized differential signaling
TMG transmogrifier
TMO timeout
TOD time of day
TOE TCP offload engine
TOFU trust on first use
TOS terms of service
TOS trusted operating system
TOS type of service
TOTP time-based one time password
TP transaction processing
TPI tracks per inch
TPM transactions per minute
TPM trusted platform module
TPR task priority register
TPS transactions per second
TPS transmission parameters signaling
TR task register
TR token ring
TRL timing recovery loop
TRNG true random number generator
TS terminal services
TS time series
TS time stamp
TS transport stream
TSAN Thread Sanitizer
TSC time stamp counter
TSD time stamp disable
TSDB time series database
TSL test, set, lock
TSO TCP segmentation offload
TSO Total Store Ordering
TSO time sharing option
TSP Time-Stamp Protocol
TSP Tunnel Setup Protocol
TSP time synchronization protocol
TSP traveling salesman problem
TSS task state segment
TSV tab-separated values
TSX transaction synchronization extensions (Intel)
TTL time to live
TTL transistor-transistor logic
TTM translation table maps
TTY teletype
TU translation unit
TUI {terminal,text-based,textual} user interface
TX {transmit out,transmitter}
TXG transaction group
TZ time zone
UAC user {access,account} control
UAF use-after-free
UART universal asynchronous receiver/transmitter
UAT user acceptance testing
UB undefined behavior
UBSAN Undefined Behavior Sanitizer
UC uncacheable
UCS unified computing system
UCS uniform-cost search
UCS universal coded character set
UDI uniform driver interface
UDMA ultra DMA
UDO ultra density optical
UDP User Datagram Protocol
UDS Unix Domain Socket
UEFI unified extensible firmware interface
UFO UDP fragmentation offload
UFS Unix File System
UGA universal graphics adapter
UI unit interval
UI user interface
UICC universal integrated circuit card
UID unique identifier
UID user identifier
UL upload
ULA unique local address
UMA uniform memory access
UMA upper memory area
UMB upper memory block
UML unified modeling language
UMPC ultra-mobile PC
UPNP universal plug and play
UPS uninterruptible power supply
URI uniform resource identifier
URL uniform resource locator
URN uniform resource name
USART universal synchronous/asynchronous receiver/transmitter
USB universal serial bus
USWC uncacheable speculative write combining
UT unit test
UTC coordinated universal time
UTF unicode transformation formats
UTP unshielded twisted pair
UTS UNIX time-sharing
UUCP Unix-to-Unix Copy Protocol
UUID universally unique identifier
UUOC useless use of cat
UUT unit under test
UX user experience
VA vertical alignment
VA virtual address
VA volt-ampere
VAX virtual address extension
VB Visual Basic
VBR volume boot record
VCA variable-gain amplifier
VCC common collector voltage
VCCP virtual chassis control protocol
VCF voltage-controlled filter
VCM virtual channel memory
VCO voltage-controlled oscillator
VCP virtual chassis port
VCS version control system
VDP vulnerability disclosure policy
VDPAU Video Decode and Presentation API for Unix
VES virtual execution system
VESA Video Electronics Standards Association
VFO variable-frequency oscillator
VFS virtual file system
VG volume group
VGA Video Graphics Array
VHD virtual hard disk
VHDCI very high density cable interconnect
VID {VLAN,voltage level} identifier
VIM Vi IMproved
VIPT virtually indexed, physically tagged
VIVT virtually indexed, virtually tagged
VLAN virtual local area network
VLD variable-length decoding
VLIW very long instruction word
VLSI very large scale integration
VLSM variable length subnet mask
VM virtual {machine,memory}
VME virtual mode extension
VMX vector multimedia extensions
VMX virtual machine extensions
VNC virtual network computing
VNI virtual network identifier
VOD video on demand
VPD vital product data
VPN virtual private network
VPWS virtual private wire service
VR virtual reality
VRAM video random access memory
VRF virtual routing and forwarding
VRM voltage regulator module
VROC Virtual RAID On CPU
VRRP Virtual Router Redundancy Protocol
VSTP VLAN Spanning Tree Protocol
VTEP VXLAN tunnel endpoint
VTP VLAN Trunking Protocol
VXFS Veritas file system
VXLAN virtual extensible LAN
VXVM Veritas volume manager
W watt
W3C World Wide Web Consortium
WAFL write anywhere file layout
WAMP Web Application Messaging Protocol
WAN wide area network
WAP Wireless Application Protocol
WAP wireless access point
WDDM Windows Display Driver Model
WDM Wavelength Division Multiplexing
WDM Windows Driver Model
WDT watchdog timer
WEP Wired Equivalent Privacy
WFI wait for interrupt
WFQ weighted fair queuing
WH write hit
WHEA Windows hardware error architecture
WIFI wireless fidelity
WLAN wireless local area network
WM write miss
WMF Windows meta file
WMI Windows Management Instrumentation
WOL Wake-on-LAN
WOM Wake-on-Modem
WOR Wake-on-Ring
WORM write once read many
WP WordPerfect
WP word processor
WP write protect
WPA Wi-Fi Protected Access
WPA2 Wi-Fi Protected Access II
WPAD web proxy auto-discovery protocol
WPS Wi-Fi Protected Setup
WRAM window random access memory
WS web services
WTC write through caching
WTD weighted tail drop
WWAN wireless wide area network
WWW world wide web
WYSIAYG what you see is all you get
WYSIWYG what you see is what you get
XBAR crossbar
XDMCP X Display Manager control protocol
XER XML encoding rules
XGA Extended Graphics Array
XHR XMLHttpRequest
XIP execute in place
XML Extensible Markup Language
XMSS eXtended Merkle Signature Scheme
XNA XNA's not acronymed
XNS Xerox network systems
XOF eXtendable-Output Function
XOR exclusive or
XP extreme programming
XSI X/Open System Interface
XSL extensible stylesheet language
XSLT extensible stylesheet language transformations
XSS cross site scripting
XT extended technology
XTACACS extended terminal access controller access-control system
XTI X/Open transport interface
XUL XML user interface language
YACC yet another compiler compiler
YAML YAML ain't markup language
YANG yet another next generation
YAWPFAPR you are welcome; please file a problem report
YP Yellow Pages
YTD year to date
ZAP ZFS attribute processor
ZBR zone bit recording
ZFOD zero-filled on demand
ZFS zettabyte file system
ZIF zero insertion force
ZIFS zero insertion force socket
ZIL ZFS intent log
ZMA zone multicast address
ZOI zero one infinity
ZOI zone of influence
ZPL ZFS Posix layer
ZSK zone signing key
ZVOL ZFS Volume