ttack

unix v7是最后一个广泛发布的研究型UNIX版本

.SH
Acknowledgements
.PP
I am deeply indebted to J. F. Ossanna,
the author of
.UL troff ,
for his repeated patient explanations
of
fine points,
and for his continuing willingness to
adapt
.UL troff
to make other uses easier.
I am also grateful to Jim Blinn, Ted Dolotta,
Doug McIlroy, Mike Lesk and Joel Sturman
for helpful comments on this paper.
.SH
References
.LP
.IP [1]
J. F. Ossanna,
.ul
.UC NROFF/TROFF
User's Manual,
Bell Laboratories
Computing Science Technical Report 54, 1976.
.IP [2]
B. W. Kernighan,
.ul
A System for Typesetting Mathematics _ User's Guide
.ul
(Second Edition),
Bell Laboratories
Computing Science Technical Report 17, 1977.
.IP [3]
M. E. Lesk,
.ul
TBL _ A Program to Format Tables,
Bell Laboratories
Computing Science Technical Report 49, 1976.
.IP [4]
M. E. Lesk,
.ul
Typing Documents on UNIX,
Bell Laboratories, 1978.
.IP [5]
J. R. Mashey and D. W. Smith,
.ul
PWB/MM _
.ul
Programmer's Workbench Memorandum Macros,
Bell Laboratories internal memorandum.