| Acronym | Meaning |
 | PIF | Program Information File |
| UNIX | Universal Interactive Executive / Uniplexed Information And Computing System |
| SMS | Systems Management Server |
| HMA | High Memory Area |
| ULTRAATA | Ultra AT Attachment |
| CODEC | Compression/Decompression |
| AML | Astronomy Markup Language |
| SSSCA | Security Systems Standards And Certification Act |
| EBCDIC | Extended Binary Coded Decimal Interchange Code |
| ISA | Industry Standard Architecture |
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