[Jon A.]

There are lots more versions than than those, i.e the first version of 95 which couldn't use the FAT32 file system and had a myriad of other problems, 95A which wasn't much different, then 95 OSR2, 2.1 and 2.5 which were only available to OEMs. The first release of 98 wasn't much more than 95 OSR2.5 made available in a retail package; USB support was still pretty dodgy. This was corrected for 98SE. I guess versions older than 3.1 were not very widely used. I used to have Windows 3.0 on 5.25" floppies, installed it just for kicks but never really used it. I just remembered there were several versions of NT as well, XP basically being one of them released a few years too late. Considering what just happened to 10, I'm glad I'm still on 7 Pro.