NASA Abbreviations and Acronyms

1. ISP
   Inertial Sun-Point
2. ISP
   Initial Specific Impulse
3. ISSA
   Integrated Software Safety Analysis
4. J&S
   jammer-to-signal ratio
5. L/V
   Launch Vehicle
6. m&a
   monitor and alarm
7. M/M
   Materials and Maintenance
8. M/M
   maximum and minimum
9. MIS
   Manipulator Jettison System (subsystem)
10. MIS
    Mission Information Subsystem
11. N/P
    Not Provided
12. NAP
    Navigation Analysis Program
13. NAR
    Numerical Analysis Research
14. O/S
    Operating System
15. P&I
    Performance and Interface (specification)
16. P2P
    Point-To-Point
17. P2P
    Program to Program
18. PAR
    Performance and Accountability Report
19. PAR
    Performance Assurance Requirements
20. PAR
    Planning Action Request

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