| Acronym | Meaning |
| TIROS | ToPographical Infrared Operations Satellite |
| CMACS | Central Monitor And Control System |
| DDPF | Dedicated Display Processing Function |
| CAB | Civil Aeronautics Board |
| SM/PM | System Management/Performance Monitor |
| PRR | Program Requirements Review |
| TPF | Tug Processing Facility |
| ICC | Interstate Commerce Commission |
| EOR | Earth Orbit Rendezvous |
| LRSI | Low-temperature Reusable Surface Insulation |