| Acronym | Meaning |
| HB | High Bay |
| CEIT | Crew Equipment Interface Test |
| IGDS | Iodine Generating And Dispensing SYstem |
| L/S | Landing Site |
| TTA | Time To Apogee |
| RDD | Requirements Definition Document |
| ERNO | Germany (SPacelab Contractor) |
| FLTSATCOM | Fleet Satellite Communications |
| HAD | Heat Actuated Device |
| KOPS | Thousand Of Operations Per Second |