| Acronym | Meaning |
 | HMU | Helmet Mounted Unit |
 | SSR | Software Specification Review |
 | MTBERA | Mean Time Between Essential Replacement Action |
 | MTBF | Mean Time Between Failure |
 | EOUT | Flameout |
 | OTCIXS | Officer Tactical Command Information Exchange System |
 | SWNRAC | Surface Warfare Naval Reserve Advisory Committee |
 | MSSS | Model 901 Simulation Support Software |
 | MTBFSAF | Mean Time Between Flight Safety Affecting Failures |
 | MSG | Message |