> IBM was selling OS/2 2.0 versions on 3½” and 5¼” HD floppies as well as CD-ROM versions, although CD-ROM drives were far from common in 1992 and OS/2 2.0 only supported a few SCSI CD-ROMs. The tested version was delivered on 3½” floppies, 21 disks total.
http://www.os2museum.com/wp/os2-history/os2-2-0/
> IBM was selling OS/2 2.0 versions on 3½” and 5¼” HD floppies as well as CD-ROM versions, although CD-ROM drives were far from common in 1992 and OS/2 2.0 only supported a few SCSI CD-ROMs. The tested version was delivered on 3½” floppies, 21 disks total.