AS/400 and RS/6000 are not (per official IBM terminology) “mainframes”. AS/400s were classified as “midrange” systems. From the floppy, I’m guessing it was mor

AS/400 and RS/6000 are not (per official IBM terminology) “mainframes”. AS/400s were classified as “midrange” systems. From the floppy, I’m guessing it was more likely to be an AS/400. (RS/6000s had them too, and they were originally invented on mainframes, where they were used for microcode updates-but I believe AS/400s dropped them later than RS/6000s and mainframes did.) Now the RS/6000 and AS/400 lines have been merged at the hardware level - but an old machine being thrown out in 2001/2002 would have been from when they were still distinct hardware.