====== USG PG-1C300 Issue 2  ======

**Release Date:** January, 1976\\
**Released By:** UNIX Support Group\\
**Source Code: ** None Available\\
**Documentation: **[[http://www.bitsavers.org/pdf/att/unix/6th_Edition/UNIX_Programmers_Manual_197601.pdf|UNIX Programmer's Manual PG-1C300 Issue 2]] is the programmer's manual and [[https://www.tuhs.org/Archive/Distributions/USDL/unix_program_description_jan_1976.pdf|UNIX Program Description]] is a description of the various routines in the Issue 2 kernel\\

UNIX Program Generic Issue 2, otherwise known as PG-1C300, is a version of the UNIX operating system issued by the UNIX Support Group in January of 1976. 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.

This version appears to be comparable to [[systems:6th_edition|Sixth Edition Unix]], albeit retaining some components from earlier Research versions and incorporating some new features that would show up in [[systems:7th_edition|Seventh Edition Unix]] and [[systems:pwb|PWB Unix]].  The later [[systems:usg3|Issue 3]] system is partially documented in the [[systems:mert0|MERT Release 0]] manual.