| Acronym | Meaning |
| VEI | Vehicle End Item |
| ERSI | Elastomeric Reusable Surface Insulation |
| TD | Technical Directive |
| CIU | Controller Interface Unit |
| PRCB | ProgramRequirementsControlBoard |
| LRF | Liquid Rocket Fuel |
| BC | Bus Coupler |
| GDSO | Ground Data Systems Officer |
| SCIT | Standard Change Integration And Tracking |
| ESS | Essential |