\"      @(#)ae9 6.1 (Berkeley) 5/22/86
\"
SH
Acknowledgement
PP
I am grateful to Ted Dolotta
for his careful reading and valuable suggestions.
SH
References
IP [1]
Brian W. Kernighan,
ul
A Tutorial Introduction to the UNIX Text Editor,
Bell Laboratories internal memorandum.
IP [2]
Brian W. Kernighan,
ul
UNIX For Beginners,
Bell Laboratories internal memorandum.
IP [3]
Ken L. Thompson and Dennis M. Ritchie,
ul
The UNIX Programmer's Manual.
Bell Laboratories.