One of the last computer fairs I went to, they were flogging OS/2 ?Warp? for cheap. Boxes and boxes of it at every second booth.
Never used it extensively but always had kind of a high opinion of it. Too bad it's mostly fallen by the wayside.
I had it installed briefly on a machine. Windows 95 changed the way things looked in the computer world and OS/2 didn't look look that.
I seem to remember that it didn't even have an Ethernet stack in it, so you couldn't even connect it to anything.
Token Ring was it's out-of-the-box thing. Highly deterministic network and was IBM's baby(some babies are ugly, and that's ok). IP stack became available. My first real Internet account was via a PPP service IBM had for a while catering to OS/2 users.
But 74240,1042 holds the title of first online me. Never did meet Rev. Stang like I wanted to.
Edit: Just noticed the Tops-10 comment. And here we have a what began life as a PPN. Small world.