Glossary of Abbreviations
| AD/NE | Assistant Director for National Estimates |
| AEC | Atomic Energy Commission |
| BMEWS | Ballistic Missile Early Warning System |
| BNE | Board of National Estimates |
| CIG | Central Intelligence Group, precursor of CIA |
| CINCLANT | Commander in Chief, Atlantic Fleet |
| COMINT | Communications Intelligence |
| Cratology | The study of the size and function of shipping crates seen on photographs (from various sources). The size and configuration of a shipping crate often will indicate what is inside. |
| DCI | Director of Central Intelligence |
| DCID | Director of Central Intelligence Directive |
| DDCI | Deputy Director of Central Intelligence |
| DDI | Deputy Director for Intelligence |
| DDO | Deputy Director for Operations |
| DDP | Deputy Director for Plans |
| DIA | Defense Intelligence Agency |
| D/NFAC | Director, National Foreign Assessment Center |
| DNI | Director of Naval Intelligence |
| DO | Directorate of Operations (the CIA's organization for espionage and covert action) |
| DP | Directorate of Plans (from 1973, the Directorate of Operations) |
| EIC | Econ omic Intelligence Committee |
| FBIS | Foreign Broadcast Information Service |
| GMAIC | Guided Missile and Astronautics Intelligence Committee |
| GMIC | Guided Missile Intelligence Committee |
| IAB | Intelligence Advisory Board |
| IAC | Intelligence Advisory Committee |
| INR | Bureau of Intelligence and Research, Department of State |
| JAEIC | Joint Atomic Energy Intelligence Committee |
| JIC | Joint Intelligence Committee |
| JIS | Joint Intelligence Staff |
| MAAG | Military Assistance and Advisory Group |
| MAG | Military Assistance Group |
| NFAC | National Foreign Assessment Center |
| NFIB | National Foreign Intelligence Board |
| NIA | National Intelligence Authority |
| NIE | National Intelligence Estimate |
| NIS | National Intelligence Survey [a reference document, largely geographical in nature, prepared on a country-by-country basis] |
| NSA | National Security Agency |
| NSCID | National Security Council Intelligence Directive |
| OCI | Office of Current Intelligence |
| OER | Office of Economic Reports |
| ONE | Office of National Estimates |
| ONI | Office of Naval Intelligence |
| O/O | Office of Operations |
| ORE | Office of Reports and Estimates |
| ORR | Office of Research and Reports |
| OSD | Office of the Secretary of Defense |
| OSI | Office of Scientific Intelligence |
| OSR | Office of Strategic Research |
| OSS | Office of Strategic Services |
| PFIAB | President's Foreign Intelligence Advisory Board |
| PNIO | Priority National Intelligence Objective |
| R&A | Research and Analysis Branch of the Office of Strategic Services |
| Reports Officer | An intelligence officer responsible for the immediate evaluation of intelligence data collected in the field |
| SE | Special Estimate |
| SEC | Scientific Estimates Committee |
| SIC | Scientific Intelligence Committee, successor to SEC |
| SIE | Special Intelligence Estimate |
| SNIE | Special National Intelligence Estimate |
| TR | Terms of Reference |
| USIB | United States Intelligence Board |
| USCIB | United States Communications Intelligence Board |
