| Acronym | Meaning |
| G | CCC Ground Control Computer Center |
| STO | Stow |
| FS | Fail-Safe |
| M | Matrix |
| RGP | Rate Gyro Package |
| NET | PositivNet Positive Suction Pressure |
| HESS | High Energy Squib Simulator |
| GES | Goddard Experiment SuPport System |
| PDR | Program Director's Review |
| SPDCI | Standard Payload Display And Control Interface |