didn't have the Times Sinclair 1000 but did have the 2000. RS TRS-80, that
was fun. Had an Kaypro too, that was some thing to have for business.
Yes, IBM and MS did devlope an operating system together. IBM work on OS/2
and MS work on Windows. OS/2 could run Windows programs in an window. And
you didn't need Windows install. That was OS/2.with Win3.1.Had an copy until
about two years ago. Move and it was lost.
Still got an copy of OS/2 Warp4.