Bell 32V development

Work on file usr/man/man0/pref

Co-Authored-By: John Reiser <jfr@research.uucp>
Synthesized-from: 32v

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+.TL
+PREFACE
+.LP
+Although this Seventh Edition no longer bears their byline,
+Ken Thompson and Dennis Ritchie remain the fathers
+and preceptors of the
+.UX
+time-sharing system.
+Many of the improvements here described bear their mark.
+Among many, many other people who have contributed to
+the further flowering of
+\s-2UNIX\s0,
+we wish especially to
+acknowledge the contributions of
+A. V. Aho,
+S. R. Bourne,
+L. L. Cherry,
+G. L. Chesson,
+S. I. Feldman,
+C. B. Haley,
+R. C. Haight,
+S. C. Johnson,
+M. E. Lesk,
+T. L. Lyon,
+L. E. McMahon,
+R. Morris,
+R. Muha,
+D. A. Nowitz,
+L. Wehr,
+and
+P. J. Weinberger.
+We appreciate also 
+the effective advice and criticism of
+T. A. Dolotta,
+A. G. Fraser,
+J. F. Maranzano,
+and
+J. R. Mashey;
+and we remember the important work of
+the late Joseph F. Ossanna.
+.sp 2
+.in 4i
+B. W. Kernighan
+.br
+M. D. McIlroy
+.in 0