Editing List of operating systems (section)

===Bell Labs===
* [[Unix]] ("Ken's new system," for its creator ([[Ken Thompson]]), officially Unics and then Unix, the prototypic operating system created in Bell Labs in 1969 that formed the basis for the [[List of Unix systems|Unix family]] of operating systems)
** UNIX Time-Sharing System v1
** UNIX Time-Sharing System v2
** UNIX Time-Sharing System v3
** UNIX Time-Sharing System v4
** UNIX Time-Sharing System v5
** [[Version 6 Unix|UNIX Time-Sharing System v6]]
*** MINI-UNIX
*** [[PWB/UNIX]]
**** USG
***** [[CB Unix]]
** [[Version 7 Unix|UNIX Time-Sharing System v7]] (It is from Version 7 Unix (and, to an extent, its descendants listed below) that almost all Unix-based and Unix-like operating systems descend.)
*** [[UNIX System III|Unix System III]]
*** Unix System IV
*** [[UNIX System V|Unix System V]]
**** Unix System V Releases 2.0, 3.0, 3.2, 4.0, and 4.2
** [[Version 8 Unix|UNIX Time-Sharing System v8]]
** [[Version 9 Unix|UNIX Time-Sharing System v9]]
** [[Version 10 Unix|UNIX Time-Sharing System v10]]

Non-Unix Operating Systems:
* [[BESYS]]
* [[Plan 9 from Bell Labs]]
* [[Inferno (operating system)|Inferno]]