Apple was just the first company to design the SCSI interface into their computers and use it. IBM invented SCSI, although they don't know it and/or take credit for it. They were using it on their mini computer's in the 60's and 70's. A gentleman by the name of Alan Shugart copied it from IBM and applied it to the Micro Computer world. At first it was called; SASI. SASI = Shugart Associates System Interface In the early 80's it became a standard and the name was changed to: SCSI SCSI = Small Computer System Interface. The initial SCSI Standard was so poorly done that it was proprietary. By that I mean that if you bought a "SCSI" tape drive from a company, you also had to buy their SCSI Host Adapter, or you would NEVER get it to work. Over time, the spec got tighter and tighter and it truly became a standard. HTH -- Don Woodall shooting electrons at you from Grand Rapids, Michigan. Computing with IBM's OS/2 Warp, Merlin Convenience Pack Beta, eCS Communicating with Nick Knight's MR/2 ICE, Version 2.25 S/N 393. This OS/2 system uptime is 5 days 23:40 hours :^( (en).