| Acronym | Long Form |
| ACOM | Alien COMmunications. |
| AFB | Air Force Base. |
| AFOSR | Air Force Office of Scientific Reasearch ( USAF ) |
| APRO | Aerial Phenomena Research Organization |
| ATRANS | Alien TRANSport |
| ATECH | Alien TECHnology. |
| ATIC | Air Technical Intelligence Center ( USAF ) |
| CAUS | Citizens Against UFO Secrecy. |
| CIA | Central Intelligence Agency. |
| COMINT | COMmunications INTelligence. |
| COMPUSEC | COMPUter SECurity. |
| COMSEC | COMmunications SECurity. |
| CSICOP | Committee for the Scientific Investigation of Claims of the Paranormal |
| CSS | Central Security Service ( USA ) |
| CUFOS | Center for UFO Studies |
| DDO | Deputy Director of Operations ( USA ) |
| DDI | Deputy Director of Information Systems Security ( USA ) |
| DDT | Deputy Director of Technology ( USA ) |
| DIRNSA | DIRector of the NSA and Chief of the CSS ( USA ) |
| DoD | Department of Defense. |
| EDH | Extradimensional Hypothesis. |
| ELINT | ELectronic INTelligence. |
| ELT | Executive Leadership Team of the DIRNSA. |
| ETH | ExtraTerrestrial Hypothesis or ExtraTemporal Hypothesis |
| FOIA | Freedom Of Information Act ( USA ) |
| FTD | ForeignTechnology Division ( USA ) |
| FTL | Faster Than LLight |
| HPSCI | House Permanent Select Committee on Intelligence ( USA ) |
| ICBM | InterContinental Ballistic Missile. |
| INFOSEC | INFOrmation Systems SECurity. |
| IOB | Intelligence Oversight Board of the the President ( USA ) |
| JCS | Joint Chiefs of Staff of the United States. |
| LASER | Light Amplification by Stimulated Emission of Radiation. |
| MEPP | Mathematics Education Partnership Program ( USA ) |
| MIB | Men In Black ( ufology ) |
| NACA | National Advisory Committee for Aeronautics ( USA ) |
| NARA | National Archives and Records Administration ( USA ) |
| NASA | National Aeronautics & Space Administration ( USA ) |
| NRAO | National Radio Astronomy Observatory ( USA ) |
| NSA | National Security Agency ( USA ) |
| NSC | National Security Council ( USA ) |
| NSCID | National Security Council Intelligence Directive ( USA ) |
| OMB | Office of Management and Budget of the President ( USA ) |
| OPSEC | OPerations SECurity ( USA ) |
| OSI | Office of Scientific Intelligence ( USA ) |
| RADAR | RAdio Detection And Ranging |
| RAF | Royal Air Force ( UK ) |
| RCAF | Royal Canadian Air Force |
| SDI | Strategic Defense Initiative ( USA ) |
| SECDEF | SECretary of DEFense for the The United States. |
| SETI | Search For ExtraTerrestrial Intelligence. |
| SIGINT | SIGnals INTelligence. |
| SSCI | Senate Select Committee on Intelligence ( USA ) |
| SST | SuperSonic Transport. |
| STT | SecretTerrestrial Technology. |
| UAO | UnidentifiedAerial Object. |
| UFO | Unidentified Flying Object. |
| UFOB | Unidentified Flying OBject. |
| USA | United States Army or United States of America |
| USAAF | United States Army Air Force. |
| USAF | United States Air Force. |
| USGS | United States Geological Survey |
| USI | Ufology Society International. |
| USMC | United States Marines Corps. |
| USN | United States Navy. |
| USSR | Union of Soviet Socialist Republics. |
| VLA | Very Large Array radio telescope ( USA ) |