| Acronym | Meaning |
 | FR | Frame |
| TDS | Test Data System |
| SYNCOM | Synchronous Communication Satellite (Hughes) |
| MOF | Manned Orbital Flight |
| MCC-K | Mission Control Center-Kennedy |
| PDL | Procedure Distribution List |
| HRM | High-rate Multiplexer |
| RTCC | Real-Time Computer Complex |
| PIECP | Preliminary Impact Engineering Change Proposal |
| HECV | Helium Check Valve |
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