I own an inoperable relic which has an EISA bus, SCSI card, advanced VGA card, Colorado tape drive, Zip Drive, and a fair amount of RAM to support a 486DX-50. I

I own an inoperable relic which has an EISA bus, SCSI card, advanced VGA card, Colorado tape drive, Zip Drive, and a fair amount of RAM to support a 486DX-50. I ran DOS, Windows 3.11, and OS/2 2.0 on it at various times. I may have tried out Windows NT 3.something too. These components and the EISA bus itself were standard enough to be supported by that range of OS's.