RP01 Memorex 630-1  equivalent to IBM 2311 (7 MB); shipped late 1968
RP02 Memorex 660-2  equivalent to IBM 2314 (29 MB); shipped early 1969
RP03 ISS 715        equivalent to double density 2314 (58 MB)
RP04 ISS 733-10     equivalent to IBM 3330 (100 MB)
RP05 Memorex 677-51 equivalent to IBM 3300 (100 MB)
RP06 Memorex 677-01 equivalent to IBM 3330-11 (200 MB)
RP07 ISS 735        equivalent to IBM 3350 (300 MB)