| Acronym | Meaning |
| IPS | IRV Isotope Reentry Vehicle |
| SCGSS | Super Critical Gas Storage System |
| PAM | Payload Assist Module |
| PIC | Pyrotechnic Initiator Controller |
| M | Number Of Revolutions Required For The Rendezvous |
| MTC | Master Thrust Controller |
| MCPC | Manipulator Controller Power Conditioner |
| TA | Task Analysis |
| KIP | Keyboard Input Processor |
| O | Engineering Order |