Editing List of operating systems (section)

====On PC and Intel x86 based architectures====<!--IBM-->
* [[PC DOS]], IBM DOS
** PC DOS 1.x, 2.x, 3.x (developed jointly with Microsoft)
** IBM DOS 4.x, 5.0 (developed jointly with Microsoft)
** PC DOS 6.1, 6.3, 7, 2000, 7.10
{{See also|List of operating systems#Microsoft Corporation|l1=MS-DOS and Windows}}
* [[OS/2]]
** OS/2 1.x (developed jointly with Microsoft)
** OS/2 2.x
** [[OS/2 Warp]] 3 (ported to PPC via [[Workplace OS]])
** [[OS/2 Warp]] 4
** [[eComStation]] (Warp 4.5/Workspace on Demand, rebundled by Serenity Systems International)
** [[ArcaOS]] (Warp 4.52 based system sold by Arca Noae, LLC)
* [[IBM 4680 OS]] version 1 to 4, a [[point of sale|POS]] operating system based on [[Digital Research]]'s [[Concurrent DOS 286]] and [[FlexOS 286]] 1.xx
** [[IBM 4690 OS]] version 1 to 6.3, a successor to 4680 OS based on [[Novell]]'s [[FlexOS 286]]/[[FlexOS 386]] 2.3x
*** [[Toshiba 4690 OS]] version 6.4, a successor to 4690 OS 6.3
* [[Unix-like]] on [[IBM Personal System/2|PS/2]]
** [[IBM AIX#IBM PS/2 series|AIX]] (IBM's Advanced Interactive eXecutive, a System V Unix version)