Below is a list of the 10 AT&T BTL (Bell Telephone Labs) editions of the Unix Programmer's Manual. The tenth edition was published commercially in 1990. The first six editions bear the names of Thompson and Ritchie on the title page; the seventh edition was headed, for the first time, with the statement ``Unix (tm) time-sharing system,'' with no names, although there is a brief preface by ``B. W. Kernighan [and] M. D. McIlroy.'' The eighth and ninth editions carry brief prefaces by McIlroy alone; they also carry the rubric ``research version.'' The preface to the tenth edition is signed ``A. G. Hume, M. D. McIlroy, October, 1989.''
Illustration: BTL Unix Time Line
Flexible C++
Matthew Wilson
My approach to software engineering is far more pragmatic than it
is
theoretical--and no language better exemplifies this than C++.
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BTL Unix Editions
