http://www.ecomstation.com/news.phtml?action=fullnews&id=2157&title=The%20GUIdebook:%20OS/2%20and%20eComStation%20timeline The GUIdebook: OS/2 and eComStation timeline

March 09, 2007 by Mark Dodel

There is a website with timelines of different operating systems and their GUI components. They have a timeline for OS/2 and eComStation:

http://www.guidebookgallery.org/timelines/os2

They also have the OS/2 2.1 tutorial:
http://www.guidebookgallery.org/tutorials/os221