====== Fifth Edition Unix ======

**Release Date:** June 1974\\
**Released By:** Bell Labs Research\\
**Source Code: ** [[http://www.tuhs.org/Archive/PDP-11/Distributions/research/Dennis_v5/v5root.tar.gz|v5root.tar.gz ]]in the [[http://www.tuhs.org/Archive/PDP-11/Distributions/research/Dennis_v5/|Unix Archive]], browsable in the [[http://www.tuhs.org/cgi-bin/utree.pl?file=V2|Unix Tree]]\\
**Documentation: ** [[http://www.tuhs.org/Archive/PDP-11/Distributions/research/Dennis_v5/v5man.pdf|5th Edition man pages]]

The Fifth Edition of Unix was released by Bell Laboratories in June 1974. It was designed to run on the PDP-11s with 18-bit addressing and without separate Instruction and Data spaces, for example the PDP-11/40. The kernel's image size was around 26 Kbytes. At this stage in the development of Unix, neither the Standard I/O library nor the Bourne shell existed, and the editor was ed.