| Acronym | Meaning |
| CEA | Center For EUV Astrophysics |
| APU | Auxiliary Power Unit |
| HPFTP | High Pressure Fuel Turbopump |
| IKI | Institut Kosmischeskikh Issledovaniya |
| GSFC | Goddard Space Flight Center |
| NACA | National Advisory Committee On Aeronautics |
| IPMP | Investigations Into Polymer Membrane Processing |
| M | Messier |
| APM | Attached Pressurized Module (a.k.a. Columbus) |
| EMU | Extravehicular Mobility Unit |