| Acronym | Meaning |
![](file.png) | IUS | Inertial UPper Stage (was Interim UPper Stage) |
![](file.png) | IUS | Interim Use Sheet |
![](file.png) | IUS | Interim/intermediate UPper State |
![](file.png) | IUS | International Ultraviolet ExPlorer |
![](file.png) | IV | Initial Velocity |
![](file.png) | IV | Integrated Vehicle |
![](file.png) | IV | Interface Volume |
![](file.png) | IV | Interior Upper Stage |
![](file.png) | IV | Intravehicular |
![](file.png) | IVA | Intravehicular Activity |
![](file.png) | IVA | Intravehicular Activity |
![](file.png) | IVAR | Internal Variable |
![](file.png) | IVBC | Integrated Vehicle Baseline Config |
![](file.png) | IVC | Intervehicular Communications |
![](file.png) | IVE | Interface Verification EquiPr-nent |
![](file.png) | IVL | Lntervatometer |
![](file.png) | IVSI | Instantaneous Vertical Speed Indicator |
![](file.png) | IVT | Intervehicular Transfer |
![](file.png) | IWBS | Indirect Work Breakdown Structure |
![](file.png) | IWG | Interface Working Group |
![](file.png) | IWG | Investigator Working Group |
![](file.png) | J/M | Jettison Motor |
![](file.png) | JAEIC | Joint Atomic Energy Intelligence Committee |
![](file.png) | JAN | Joint Army-Navy |
![](file.png) | JAS | Journal Of Aerospace Science |
![](file.png) | JB | Junction Box |
![](file.png) | JCL | Job Control Language |
![](file.png) | JCP | Joint Power Conditions |
![](file.png) | JCT | Junction |
![](file.png) | JED | Julian Ephemeris Data |
![](file.png) | JETS | Joint Electronics Type (Designation) System |
![](file.png) | JETT | Jettison |
![](file.png) | JIR | Job Improvement Request |
![](file.png) | JO | Job Order |
![](file.png) | JOD | Joint Occupancy Data |
![](file.png) | JOD | Joint Occupancy Date |
![](file.png) | JOIP | Joint Operations Interface Procedure |
![](file.png) | JOP | Joint Operating Procedure |
![](file.png) | JOP | Jupiter Orbiter Probe-Galilee |
![](file.png) | JOR | Job Order Request |
![](file.png) | JOULE | (SI UJoule (SI Unit) |
![](file.png) | JOVIAL | Joules Own Version International Algebraic Language |
![](file.png) | JP | Jet Propellant |
![](file.png) | JP | Jet Propulsion |
![](file.png) | JPC | Joint Power Condition |
![](file.png) | JPIC | Joint Program Integration Committee |
![](file.png) | JPL | Jet Propulsion Laboratory |
![](file.png) | JPL | Jet Propulsion Laboratory |
![](file.png) | JPOC | JSC Payload Operations Center |
![](file.png) | JPP | Joint Program Plan |