| Abbreviation | Definition |
|---|---|
| MTEM | Mechanical Maintenance Test Equipment |
| MTEO | Optical Maintenance Test Equipment |
| MTF | Mississippi Test Facility (now National Space Technology Laboratories) |
| MTFI | Main Trial For Ignition |
| MTFO | Modular Training Field Option |
| MTGP | Monitor Table Generator Program |
| MTGW | Maximum Total Gross Weight |
| MTK | Mechanical Time Keeping |
| MTL | Main Transfer Line |
| MTL | MaTeriaL |
| MTLP | Monitor Table Listing Program |
| MTM | Methods Time Measurement |
| MTO | Magnetic Tape Operator |
| MTO | Master Timing Oscillator |
| MTO | Maximum Time Out |
| MTO | Mission, Task, Objective |
| MTO | Modification Task Outline |
| MTOF | Mass Time Of Flight |
| MTOGW | Maximum Takeoff Gross Weight |
| MTOGW | Maximum Take-Off Gross Weight |