NASA Abbreviations and Acronyms

1. MEI
   Master Inspection Item
2. MEIG
   Main Engine Ignition
3. MEIU
   Main Engine Interface Unit
4. MEKF
   Misson Equipment Kit Facility
5. MEL
   Minimum Equipment List
6. MEL
   Master Equipmentlist
7. MELI
   Minimum Equipment List Index
8. MELI
   Master Equipment List Index
9. MEM
   Module Exchange Mechanism
10. MENS
    Mission Element Needs Statement (OPNAV)
11. MEOP
    Maximum Expected Operating Pressure
12. MEP
    Main Entry Point
13. MEP
    Mean Effective Pressure
14. MEP
    Mars Exploration Program
15. MEP
    Management Education Program
16. MEP
    Minimum Entry Point
17. MER
    Meridian
18. MER
    Maximum Error Rate
19. MER
    Mars Exploration Rover
20. MER
    Mission Evaluation Room

Last updated: May 6, 2025 — Total entries: 14,020