====== Research Unix ======

These are the versions of Unix developed at Bell Laboratories, initially by Ken Thompson and Dennis Ritchie, later by many other of the researchers there.

[[:systems:pdp7_unix|PDP-7 Unix]]

[[:systems:1st_edition|First Edition Unix]]

[[:systems:2nd_edition|Second Edition Unix]]

[[:systems:3rd_edition|Third Edition Unix]]

[[:systems:4th_edition|Fouth Edition Unix]]

[[:systems:5th_edition|Fifth Edition Unix]]

[[:systems:6th_edition|Sixth Edition Unix]]

[[:systems:7th_edition|Seventh Edition Unix]]

[[:systems:8th_edition|Eighth Edition Unix]]

[[:systems:9th_edition|Ninth Edition Unix]]

[[:systems:10th_edition|Tenth Edition Unix]]