| Acronym | Meaning |
 | ECU | Environmental Control Unit |
| AAAA | Army Aviation Association Of America |
| ENVIR | Environment |
| MDMDS | Maintenance Data System |
| OTPS | Operational Test Program Set |
| W/S | Weapon System |
| MTASS | Machine Transferable Support Software |
| SSA | Strapdown Sensor Assembly |
| EE | Electrical Engineering |
| ECS | Engineering Change Support |
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