NASA Abbreviations and Acronyms

1. RIDI
   Receiving Inspection Detail Instruction
2. RIE
   Right Inboard Elevon
3. RIF
   Relative Importance Factor
4. RIG
   Rate Integrating Gyro
5. RIG
   Rate Integration Gyro
6. RIGI
   Receiving Inspection General Instruction
7. RIL
   Repairable Item List
8. RIL
   Reparableltemlist
9. RIL
   Recoverable Item(s) List(s)
10. RIN
    Resistance
11. RIPS
    Radar Impact Prediction System
12. RIR
    Receiving Inspection
13. RIR
    Reportable Item Report
14. RIS
    Reporting Identification Symbols
15. RISK
    Risk Management
16. RISKAC
    Risk Acceptance
17. RIT
    Request for Interface Tool
18. RIU
    Remote Interface Unit
19. RIV
    Recirculation Isolation Valve
20. RJEC
    Reaction Jet Engine Control

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