Georgi,
I saw your post on CCTALK about OS/2 history and early versions.
There are many resources available on
archive.org. See:
https://archive.org/search?tab=texts&query=ibm+os2&page=2
and
https://archive.org/search?tab=software&query=ibm+os2
(You can do similar searches replacing "ibm" with "microsoft" in the
above.)
I hope this helps?
All the best,
Mark S. Waterbury