| Acronym | Meaning |
| TCS | Technical Concurrence Sheets |
| OASCB | Orbiter Avionics Software Control Board |
| WAD | Work Authorization Document/Shop Order |
| HXIS | Hard X-ray Imaging Spectrometer |
| OD | Operational Downlink/Downlist |
| IOPL | Integrated Open Problem List |
| TA | Time Actual |
| MB | Millibar |
| SP-OPI | OPerations Planning And Integration Office (KSC |
| GOSS | GrGOSSGround Operations Support System |