What is OS/2?
"We believe that OS/2 is the platform for the 90s."
OS/2 stands for Operating System/2. IBM and Microsoft developed MS OS/2, the first version of this multi-tasking 16-bit system that was intended to replace and Windows 3.x. Microsoft took part of the code to develop Windows NT 3.x. IBM continued with the development of OS/2 till 1997/2000 releasing versions 2 to 4, which are 32-bit systems. Versions 3 and 4 were released under the name OS/2 Warp.
My experiences with this system are limited to OS/2 Warp 3 (1994). OS/2 has the same feeling as Windows 3.11 or Linux 1.3 with a chunky taskbar floating on the screen. OS/2 Warp 3 came in two flavors blue and red spines. The red spine version fully supported installing Windows 3.11 under it and the blue spine offering no support.
On December 2005, IBM discontinued the OS/2 project. Many people think that the lack of interest to this OS is the result of weak North American promotion. OS/2 is more popular in Europe than in the US. Many of the sites that I have visited are in Russia and/or Germany.
In April 2017, Blue Lion was released as ArcaOS 5.0 (OS/2 5). There is no clear explanation what is going to happen to license and production of eComStation with the licensing and release of ArcaOS 5.0. Perhaps OS/2 will become the next Linux, where multiple companies and/or organizations can release custom distribution as long as IBM signs of the proper license.