| IOst.a | 02Feb22 17:03:05EST | 95K | 14 | Macintosh Micro Shell, plus standard IO consolidation for the systems below, excluding 5, 12, and the unnumbered generic C system. The enumeration is a conditional assembly selector for the indicated system. |
| Ioc.a | 14Sep21 09:36:17EDT | 11K | C | |
| Iocrds.a | 14Sep21 09:36:17EDT | 64K | 1 | Unos, Charles River Data Systems |
| Iounis3.a | 14Sep21 09:36:17EDT | 65K | 4 | Unisoft, Torch |
| Iohp3.a | 14Sep21 09:36:17EDT | 21K | 5 | Hewlett Packard |
| Iomu3.a | 14Sep21 09:36:17EDT | 67K | 6 8 |
Unix System V, Motorola Unix System V, Stride |
| Ioat3.a | 14Sep21 09:36:17EDT | 67K | 7 | AT&T Unix |
| Iomin.a | 14Sep21 09:36:17EDT | 8.7K | 9 | Minimum |
| Iosun.a | 14Sep21 09:36:17EDT | 66K | 10 | Sun |
| Ioatari.a | 14Sep21 09:36:17EDT | 68K | 11 | Atari |
| Iomac.a | 14Sep21 09:36:17EDT | 67K | 12 | Unix System V, Macintosh II |
| Ioamiga.a | 14Sep21 09:36:17EDT | 8.7K | 13 | Amiga |
| Ionext.a | 14Sep21 09:36:17EDT | 23K | 15 | NeXT |