| Acronym | Meaning |
 | NACA | National Advisory Committee On Aeronautics |
| PDRS | Payload Deployment And Retrieval System |
| OSS | Office Of The Space Station |
| ESIS | European Space Information System |
| HTHL | Horizontal Takeoff Horizontal Landing |
| TOPEX | Ocean Topography Experiment |
| HLC | Heavy Lift Capability |
| SDI | Strategic Defense Initiative |
| SEPAC | Space Experiments With Particle Accelerators |
| CETA | Crew And Equipment Translation Aid |
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