Differences

This shows you the differences between two versions of the page.

--- systems:usg3 [2026/04/30 10:34] – segaloco
+++ systems:usg3 [2026/04/30 10:51] (current) – segaloco
@@ Line 3: / Line 3: @@
 **Release Date:** March, 1977\\
 **Released By:** UNIX Support Group\\
-**Source Code: ** None Available\\
+**Source Code: ** [[https://www.tuhs.org/Archive/Distributions/USDL/Cloutier_USG_PG3/usg_pg_issue_3.tar.bz2|usg_pg_issue_3.tar.bz2]] in the [[https://www.tuhs.org/Archive/Distributions/USDL/Cloutier_USG_PG3/|Unix Archive]], browsable in the [[https://www.tuhs.org/cgi-bin/utree.pl?file=USG_PG3|Unix Tree]]\\
 **Documentation: ** The [[https://www.tuhs.org/Archive/Documentation/Manuals/Program_Generic_Issue_3/UNIX_Programmers_Manual_Program_Generic_Issue_3.pdf|UNIX Programmer's Manual]]'s for PG-1C300 has been preserved in the [[https://www.tuhs.org/Archive/Documentation/Manuals/Program_Generic_Issue_3/|Unix Archive]]\\
-UNIX Program Generic Issue 3, otherwise known as PG-1C300, is a version of the UNIX operating system issued by the UNIX Support Group in March of 1977.  The Program Generic line was used as a standard, supported UNIX base on which to base other projects and supply a computing environment to a larger group of users than the Research group could support.
+UNIX Program Generic Issue 3, otherwise known as PG-1C300, is a version of the UNIX operating system issued by the UNIX Support Group in March of 1977.  The Program Generic line was used as a standard, supported UNIX base on which to base other projects and supply a computing environment to a larger group of users than the Research group could support.  PG 3 would go on to serve as the base of the real-time MERT Release 0 system.
-PG 3 would go on to serve as the base of the real-time MERT Release 0 system.
 One particular change is the adoption of a new runlevel-based init system, an ancestor of the inittab-driven systems found in later UNIX branches.  Issue 3 also sees the adoption of SCCS from the PWB project as well as half-duplex terminal support, allowing for the use of various Dataspeed (Teletype) Model 40 terminals.
+On April 25th, 2026 it was announced that a copy of Program Generic Issue 3 had been successfully archived, preserved, and resurrected in SimH's PDP-11 emulator.  More can be found [[https://www.tuhs.org/pipermail/tuhs/2026-April/033604.html|here]].
+See Shamim Sharifuddin Pirzada's [[https://www.tuhs.org/Archive/Documentation/Theses/Shamim_Sharfuddin_Pirzada-1988-PhD-Thesis.pdf|A Statistical Examination of The Evolution of the UNIX System]] for more information about the history of USG UNIX.