| rbi | remote bus interface |
| icu | instrument control unit |
| dbi | digital bus interface |
| ssi | synchronous serial interface |
| dc | data capture |
| omif | optical monitor interface |
| m3ds | m31750 development system |
| m3ds2 | m3ds 2 |
| icb | instrument control bus |
| eid | experiment interface document |
| eidr | experiment interface document review |
| mcp | microchannel plate |
| xmm | x-ray multi-mirror mission |
| om | optical monitor |
| xmmom | xmm om |
| xmmrgs | xmm rgs |
| rgs | reflection grating spectrometer |
| esa | european space agency |
| mssl | mullard space science laboratory |
| sc | slot controller |
| s/c | spacecraft |
| s/w | software |
| h/w | hardware |
| eob | |
| tmpsu | telescope module power supply unit |
| dem | digital electronics module |
| cvs | concurrent version control |
| rcs | revision control system |
| macs | |
| bpe | blue processing electronics |
| hvu | |
| dpu | data processing unit |
| ccd | charge coupled device |
| egse | electrical ground support equipment |
| tla | three-letter acronym (self-describing) |
| etla | extended-three letter acronym (self-describing) |