| Acronym | Meaning |
 | OFDS | Orbiter Flight Dynamics Simulator |
 | MDD | Mate/demate Device |
 | SSIP | Systems Software Interface Processing |
 | MECR | Maintenance Engineering Change Request |
 | GSSC | Ground Support Systems Contractor |
 | HCF | HIM Configuration File |
 | CPC | ComputerProgramComponent |
 | TB | Terminal Board |
 | DC | Distribution Control Assembly |
 | SO | FT Square Feet |