OS/2 Time-Line

OS/2 LA 2.0

Limited availability, this was the first OS/2 release after Microsoft’s involvement with IBM.

OS/2 2.0

The official release of OS/2 2.0

OS/2 2.1

The release of OS/2 2.1 came complete with a CD option for installing. You still needed either two 3.5″ or 5.25″ floppies to get the CD installer working.

OS/2 2.11 SMP

The first client based user operating system to include SMP support.

OS/2 Warp 3.0

Red spine included just the OS/2 Warp without Window 3.1 (although you can add it with a copy of Windows 3.1.) The Blue spine came with Windows 3.1.

OS/2 Warp 4.0

The beginning of the end with IBM’s primary role. Warp 4.0 was also more focused on the user market for personal computing in competition to Windows NT series.

EcomStation 1.0 Released

eComStation 1.0 was built on the 2000 release of IBM’s Convenience Package for OS/2 Warp version 4 (commonly referred to as MCP or MCP1). Additionally, several commercial applications were bundled with the operating system package, most notably Lotus SmartSuite for OS/2 and IBM Desktop On-Call.

The IBM OS/2 install routine

OS/2 Warp 4.52

The very last OS/2 released solely by IBM.

Blue Lion (ArcaOS 5.0)

ArcaOS is an operating system based on OS/2, developed and marketed by Arca Noae, LLC under license from IBM. It was codenamed Blue Lion during its development. It builds on OS/2 Warp 4.52 by adding support for new hardware, fixing defects and limitations in the operating system, and by including