[TUHS] Early Clones / Rewrites for TUHS archives

[Nigel Williams]

On Wed, Dec 13, 2017 at 2:16 AM, Noel Chiappa <jnc at mercury.lcs.mit.edu> wrote:
> The Unix Tree does have a section for "Unix Clones", and it has Coherent,
> Xinu, Minix and some early Linuxes.

https://upload.wikimedia.org/wikipedia/commons/5/50/Unix_history-simple.png



Another Unix clone to find: http://i.imgur.com/dlGTh.png

Yourdon UNIX known as OMNIX for the Zilog Z-80
- compatible with CP/M
- ran on Industrial Microsystems and Cromemco CS-3
- had its own shell?
- multi-user and multi-process


I remain surprised/impressed that so many people from that era simply
decided to write their own Unix clone, no small undertaking at the
time.