| EELV | Evolved Expendable Launch Vehicle |
| ELV | Expendable Launch Vehicle |
| FLTSATCOM | Fleet Satellite Communications |
| FIA | Future Imagery Architecture |
| GEO | Geosynchronous Orbit |
| GBS | Global Broadcasting System |
| GDIN | Global Defense Information Network |
| GPS | Global Positioning System |
| GAO | Government Accounting Office |
| GBI | Ground-Based Interceptor |
| GBR | Ground-Based Radar |
| HSI | Hyper-Spectral Imagery |
| ISR | Intelligence, Surveillance and Reconnaissance |
| ICBM | Intercontinental Ballistic Missile |
| IRBM | Intermediate Range Ballistic Missile |
| ISS | International Space Station |
| JPL | Jet Propulsion Lab |
| JCS | Joint Chiefs of Staff |
| KEAsat | Kinetic Energy Antisatellite |
| LEO | Low Earth Orbit |
| LO | Low Observable |
| MOL | Manned Orbital Lab |
| MEADS | Medium Extended Air Defense System |
| MTCR | Missile Technology Control Regime |
| MTI | Moving Target Indicator |
| MIRV | Multiple Independently Retargetable Vehicle |
| MAD | Mutually Assured Destruction |
| NACA | National Advisory Committee on Aeronautics |
| NASA | National Aeronautical and Space Administration |
| NASP | National Aerospace Plane |
| NIMA | National Imagery and Mapping Agency |
| NMD | National Missile Defense |
| NOAA | National Oceanic and Atmospheric Administration |
| NPOESS | National Polar-Orbiting Operational Environmental Satellite System |
| NRO | National Reconnaissance Office |
| NTW | Navy Theater-Wide Defense |
| NEO | Near Earth Object |
| NBC | Nuclear, Biological and Chemical |
| OSD | Office of the Secretary of Defense |
| PAC-3 | Patriot Advanced Capabilities-3 |
| PRC | People's Republic of China |
| QDR | Quadrennial Defense Review |
| R&D | Research and Development |
| RLV | Reusable Launch Vehicle |