> AppDisk is a ramdisk. What is a ramdisk? Its a piece of software
> that lets you use some extra RAM memory as a really fast hard disk.
> The disk will appear on your desktop just like any other hard disk,
> and you can copy files to it just like normal. The only difference
> between a ramdisk and a normal disk is that when you turn the power
> off to your Mac, or restart, the contents of the ramdisk are lost.
> This is one reason AppDisk has several options to automatically save
> a copy of the ramdisk contents onto your hard disk.
>
> The difference between AppDisk and most other ramdisk programs
> (including the built-in one in the Memory control panel) is that the
> AppDisk gets the memory for its disk from its own application
> memory. Most ramdisks take memory away from your total system memory
> when you start up, so you can't get that memory back without
> restarting. To get the memory back with AppDisk, all you have to do
> is quit the AppDisk program or remove the ramdisk from your desktop
> by dragging it to the trash.
\--from the AppDisk 1.7.4 "Read Me" file
AppDisk was originally released as Shareware. It could be registered
via Kagi, or by mailing $15 to author directly.