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- 9. Statistics
- .es
- The following numbers
- are presented to suggest the scale of our operation.
- Those of our users
- not involved in document preparation
- tend to use the system for
- program development, especially language work.
- There are few important
- ``applications'' programs.
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- Overall, we have
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- .ta .5i 1.25i
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- 100 user population
- 14 maximum simultaneous users
- 380 directories
- 4800 files
- 66300 512-byte secondary storage blocks used
- .fi
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- There is a ``background'' process that
- runs at the lowest possible priority; it is used
- to soak up any idle \*sCPU\*n time.
- It has been used to produce a million-digit
- approximation to the constant \fIe\fR\(mi2,
- and is now solving all rook-and-pawn vs. rook chess
- endgames.
- Not counting this background work, we average daily
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- 2400 commands
- 5.5 \*sCPU\*n hours
- 100 connect hours
- 32 different users
- 100 logins
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- .ft I
- Acknowledgements.
- .ft R
- We are grateful to R.H. Canaday, L.L. Cherry,
- and L.E. McMahon
- for their contributions to
- \*sUNIX\*n.
- We are particularly appreciative
- of the inventiveness,
- thoughtful criticism,
- and constant support of
- R. Morris, M.D. McIlroy,
- and J.F. Ossanna.
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- .ft B
- References
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- .br
- .in 3
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- .nr r 0 1
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- \n+r. Digital Equipment Corporation.
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- \*sPDP\*n-11/40 Processor Handbook \fR(1972),
- .ft R
- .ft I
- \*sPDP\*n-11/45 Processor Handbook \fR(1971),
- .ft R
- and
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- \*sPDP\*n-11/70 Processor Handbook \fR(1975).
- .br
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- \n+r. Deutsch, L.P., and Lampson, B.W.
- An online editor.
- .ft I
- Comm. ACM 10,
- .ft R
- 12 (Dec. 1967),
- 793-799, 803.
- .br
- .ti 0
- \n+r. Richards, M.
- \*sBCPL\*n: A tool for compiler writing
- and system programming.
- Proc. AFIPS 1969 SJCC, Vol. 34,
- AFIPS Press, Montvale, N.J., pp. 557-566.
- .br
- .ti 0
- \n+r. McClure, R.M.
- \*sTMG\*n\(emA syntax directed compiler.
- Proc. ACM 20th Nat. Conf.,
- ACM, 1965, New York,
- pp. 262-274.
- .br
- .ti 0
- \n+r. Hall, A.D.
- The M6 macroprocessor.
- Computing Science Tech. Rep. #2,
- Bell Telephone Laboratories,
- 1969.
- .br
- .ti 0
- \n+r. Ritchie, D.M. C reference manual. Unpublished memorandum,
- Bell Telephone Laboratories (1973).
- .br
- .ti 0
- \n+r. Aleph-null. Computer Recreations.
- .ft I
- Software Practice and Experience 1, \fR2
- (Apr.-June 1971), 201-204.
- .br
- .ti 0
- \n+r. Deutch, L.P. and Lampson, B.W.
- \*sSDS\*n 930 time-sharing system
- preliminary reference manual.
- Doc. 30.10.10, Project \*sGENIE\*n,
- Univ. Cal. at Berkeley (Apr. 1965).
- .br
- .ti 0
- \n+r. Feiertag, R.J., and Organick, E.I.
- The Multics input-output system.
- Proc. Third Symposium on Operating Systems Principles.
- Oct. 18-20, 1971,
- ACM, New York, pp. 35-41.
- .br
- .ti 0
- \n+r. Bobrow, D.G., Burchfiel, J.D., Murphy, D.L., and
- Tomlinson, R.S.
- \*sTENEX\*n, a paged time sharing system for the \*sPDP\*n-10.
- .ft I
- Comm. ACM 15.,
- .ft R
- 3 (March 1972) 135-143.
-