IBM İşletim Sistemi

Git ve: kullan, ara

PC-DOS (originally nearly indistinguishable from Microsoft MS-DOS)
OS/2 (developed jointly with Microsoft)
- OS/2 Warp
- eComStation (licensed to Serenity Systems International)
Basic Operating System (first system released for the System 360, as an interim)
TOS
OS/360 (first OS planned for the System 360 architecture)
DOS/360
DOS/VSE
z/VSE (latest version of the VSE line)
VM/CMS
z/VM (latest version of the VM line)
MFT (later called OS/VS1)
MVT (later called OS/VS2)
SVS
MVS (latest variant of MVT)
[[TPF
OS/390
z/OS, Unix-like, (latest version of IBM mainframe OS)
System Support Product, or SSP, for IBM System/34 and System/36 minicomputers
i5/OS formerly OS/400
AIX (a version of Unix)
AOS (a version of BSD Unix)
ALCS
IBSYS
DPPX
K42

IBM has also contributed a significant amount of code to the open source operating system Linux (below).