Acronyms, Initialisms, & Abbreviations
A
- AAF: Army Air Forces
- AAFBU: Army Air Forces Base Unit
- AAFTC: Army Air Forces Training Command
- AARO: All-domain Anomaly Resolution Office
- AATIP: Advanced Aerospace Threat Identification Program
- AAWSAP: Advanced Aerospace Weapon System Applications Program
- AB: Air Base
- ABMA: Army Ballistic Missile Agency
- AC: Assistant Chief
- ACAT: Acquisition Category
- ACSI: Assistant Chief of Staff for Intelligence
- ADC: Analog-to-Digital Converter
- ADCAP: Advanced Capability
- AEC: Atomic Energy Commission
- AETC: Air Education and Training Command
- AFB: Air Force Base
- AFBU: Air Force Base Unit
- AFCC: Air Force Combat Command
- AFO: Advanced Force Operations
- AFOSI: Air Force Office of Special Investigations
- AFRICOM: Africa Command
- AFRL: Air Force Research Laboratory
- AFS: Air Force Station
- AFSOC: Air Force Special Operations Command
- AG: Attorney General
- AGN: Active Galactic Nucleus
- AIR: American Institutes for Research
- ALMR: Advanced Liquid Metal Reactor
- ALS: Advanced Light Source
- AMHS: Automated Message Handling System
- AMEWS: Advanced Materials for Energy-Water Systems
- ANL: Argonne National Laboratory
- ANNIE: Accelerator Neutrino Neutron Interaction Experiment
- AOIMSG: Airborne Object Identification and Management Synchronization Group
- APS: Advanced Photon Source
- APRO: Aerial Phenomena Research Organization
- ARC: Albany Research Center
- ARPA: Advanced Research Projects Agency
- ARPANET: Advanced Research Projects Agency Network
- ARV: Alien Reproduction Vehicle
- AS: Air Staff
- ASA: Analytical Service Agreements
- ASC: Aeronautical Systems Center
- ASCI: Accelerated Strategic Computing Initiative
- ATC: Air Traffic Control
- ATLAS: Argonne Tandem Linac Accelerator System
- ATO: Aviation Technology Office
- AUI: Associated Universities, Inc.
- AUTODIN: Automatic Digital Network
B
- BAE: British Aerospace
- BASF: Badische Anilin- und Sodafabrik
- BBN: Bolt Beranek and Newman, Inc.
- BDM: Braddock, Dunn & McDonald
- BNL: Brookhaven National Laboratory
- BPM: Beam Position Monitor
- BSRA: Battelle Savannah River Alliance
- BTC: Basic Training Center
- BWR: Boiling Water Reactor
C
- C2: Command and Control
- C4I: Command, Control, Communications, Computers and Intelligence
- CACI: California Analysis Center, Inc.; Consolidated Analysis Center, Inc.
- CAG: Combat Applications Group
- CAP: Controlled Access Program
- CASIS: Center for the Advancement of Science in Space
- CBA: Colliding Beam Accelerator
- CBP: Customs and Border Protection
- CCMD: Combatant Command
- CDF: Collider Detector at Fermilab
- CE: Close Encounter
- CEBAF: Continuous Electron Beam Accelerator Facility
- CERN: Conseil Européen pour la Recherche Nucléaire
- CFN: Center for Functional Nanomaterials
- CFTC: Central Flying Training Command
- CFS: Contract Flying School
- CIA: Central Intelligence Agency
- CINT: Center for Integrated Nanotechnologies
- CLAS: Continuous Electron Beam Accelerator Facility Large Acceptance Spectrometer
- CMI: Critical Materials Institute
- CMS: Compact Muon Solenoid
- CNES: Complex Natural and Engineered Systems
- CNM: Center for Nanoscale Materials
- CNMS: Center for Nanophase Materials Sciences
- CNWDI: Critical Nuclear Weapon Design Information
- COCOM: Combatant Command
- CODA: Continuous Electron Beam Accelerator Facility Online Data Acquisition
- COMETA: Comité d'Études Approfondies
- COMSATCOM: Commercial Satellite Communication
- COMSEC: Communications Security
- CONUS: Continental United States
- CRADA: Cooperative Research and Development Agreements
- CREST: Central Intelligence Agency Records Search Tool
- CRV: Coordinate Remote Viewing
- CSETI: Center for the Study of Extraterrestrial Intelligence
- CSN: Canadian Switched Network
- CSOC: Cyber Security Operations Center
- CTF: Coalition Task Force
- CTR: Close Target Reconnaissance
- CTRCC: Controlled Thermonuclear Research Computer Center
- CTTC: Central Technical Training Command
D
- DARHT: Dual-Axis Radiographic Hydrodynamic Test Facility
- DARPA: Defense Advanced Research Projects Agency
- DCA: Defense Communications Agency
- DCI: Director of Central Intelligence
- DCSA: Defense Counterintelligence and Security Agency
- DCEC: Defense Communications Engineering Center
- DDN: Defense Data Network
- DEN: Domestic Event Network
- DEPSECDEF: Deputy Secretary of Defense
- DERTF: Distributed Energy Resources Test Facility
- DEVGRU: Development Group
- DEW: Directed Energy Weapon
- DFTS: Defence Fixed Telecommunications Service
- DHS: Department of Homeland Security
- DIA: Defense Intelligence Agency
- DIIS: Defense Data Network Installation and Integration Support
- DIRD: Defense Intelligence Reference Document
- DISCO: Defense Industrial Security Command Operation
- DISN: Defense Information System Network
- DNA: Deoxyribonucleic Acid
- DNFSB: Defense Nuclear Facilities Board
- DNP: Dynamic Nuclear Polarization
- DOD: Department of Defense
- DOE: Department of Energy
- DOGE: Department of Government Efficiency
- DOJ: Department of Justice
- DOT: Department of Transportation
- DRSN: Defense Red Switch Network
- DS&T: Directorate of Science & Technology
- DSAI: Decision Science Applications, Inc.
- DSN: Defense Switched Network; Deep Space Network
- DSPSE: Deep Space Program Science Experiment
- DTCS: Distributed Tactical Communications System
- DTeIN: Defence Telephone Network
- DUMB: Deep Underground Military Base
- DUNE: Deep Underground Neutrino Experiment
- DVN: Defence Voice Network
E
- EBE: Extraterrestrial Biological Entity
- EBO: Exo-Biospheric-Organisms
- EBR: Experimental Breeder Reactor
- ECVoIP: Enterprise Classified Voice over Internet Protocol
- EFTC: Eastern Flying Training Command
- EIC: Electron–ion collider
- EIOC: Electricity Infrastructure Operations Center
- ELINT: Electronic Intelligence
- EMC: Electron Microscopy Center; European Muon Collaboration
- EMSL: Environmental Molecular Sciences Laboratory
- EPA: Environmental Protection Agency
- ERDA: Energy Research and Development Administration
- ESnet: Energy Sciences Network
- ESP: Extrasensory Perception
- ESRA: Energy Storage Research Alliance
- ET: Extraterrestrial
- ETH: Extraterrestrial Hypothesis
- ETOUSA: European Theater of Operations United States Army
- ETTC: Eastern Technical Training Command
- EU: European Union
- EUCOM: European Command
- EVoIP: Enterprise Voice over Internet Protocol
F
- FAA: Federal Aviation Administration
- FACET: Facility for Advanced Accelerator Experimental Tests
- FBI: Federal Bureau of Investigation
- FCD: Flight Concepts Division
- FCLib: Feature Characterization Library
- FEL: Free-Electron Laser
- FFDG: Fermi Forward Discovery Group, LLC
- FLYOBRPT: Flying Object Report
- FNAL: Fermi National Accelerator Laboratory
- FOG: Field Operations Group
- FOIA: Freedom of Information Act
- FTC: Flying Training Command
- FTD: Foreign Technology Division
- FRA: Fermi Research Alliance
- FVEY: Five Eyes
- FWS: Fish and Wildlife Service
G
- GA: General Atomics
- GAO: General Accounting Office
- GATE: Gifted and Talented Education
- GCCS: Global Command and Control System
- GCDS: Global Content Delivery System
- GCOS: General Comprehensive Operating Supervisor
- GE: General Electric
- GESTAR: Goddard Earth Science Technology and Research
- GETS: Government Emergency Telephone System
- GHQ: General Headquarters
- GIG-BE: Global Information Grid-Bandwidth Expansion
- GISA: Ground Intelligence Support Activity
- GM: General Motors
- GS&N: Global Security and Nonproliferation
H
- HINT: Hierarchical INTegration
- HEPnet: High-Energy Physics Network
- HERMES: High Energy Radiation Megavolt Electron Source
- HFBR: High Flux Beam Reactor
- HFGW: High Frequency Gravitational Waves
- HFIR: High Flux Isotope Reactor
- HQ: Headquarters
- HRS: High Resolution Spectrometer
- HUD: Housing and Urban Development
- HUMINT: Human Intelligence
I
- IARC: Illinois Accelerator Research Center
- IARPA: Intelligence Advanced Research Projects Activity
- IBRF: Integrated Biorefinery Research Facility
- IC: Intelligence Community
- ICLP: Intelligence and Security Command Center Lane Project
- ICN: Integrated Computing Network
- ICP-AES: Inductively Coupled Plasma Atomic Emission Spectroscopy
- IFR: Integral Fast Reactor
- IG: Inspector General
- IIT: Illinois Institute of Technology
- IITRI: Illinois Institute of Technology Research Institute
- ILC: International Linear Collider
- IMP: Interface Message Processor
- INMARSAT: International Maritime Satellite
- INSCOM: Intelligence and Security Command
- IOC: Initial Operational Capability
- IPLI: Internet Private Line Interface
- IS&T: Information, Science and Technology
- ISA: Intelligence Support Activity
- ITER: International Thermonuclear Experimental Reactor
J
- JAL: Japan Airlines
- JCESR: Joint Center for Energy Storage Research
- JGCRI: Joint Global Change Research Institute
- JGL: Joint Genome Institute
- JIATF: Joint Inter-agency Task Force
- JIPM: Joint Internet Protocol Modem
- JBEI: Joint BioEnergy Institute
- JSOC: Joint Special Operations Command
- JTF: Joint Task Force
- JWICS: Joint Worldwide Intelligence Communication System
K
- KIPAC: Kavli Institute for Particle Astrophysics and Cosmology
L
- LAMMPS: Large-scale Atomic/Molecular Massively Parallel Simulator
- LANL: Los Alamos National Laboratory
- LANS: Los Alamos National Security, LLC
- LANSCE: Los Alamos Neutron Science Center
- LASL: Los Alamos Scientific Laboratory
- LBNE: Long Baseline Neutrino Experiment
- LBNF: Long Baseline Neutrino Facility
- LBNL: Lawrence Berkeley National Laboratory
- LCLS: Linac Coherent Light Source
- LEBT: Low Energy Beam Transport
- LFGL: Low Frequency Gravitational Waves
- LHC: Large Hadron Collider
- LIDAR: Light Detection and Ranging
- LIMDIS: Limited Dissemination
- LINAC: Linear Particle Accelerator
- LiSA: Liquid Sunlight Alliance
- LIUFON: Long Island UFO Network
- LLNL: Lawrence Livermore National Laboratory
- LNGS: Laboratori Nazionali del Gran Sasso
- LORAN: Long Range Navigation
- LPC: Large Hadron Collider Physics Center
- LSND: Liquid Scintillator Neutrino Detector
- LTX: Lithium Tokamak Experiment
M
- M&O: Maintenance and Operations
- MAJCON: Major Command Controlled
- MARSOC: Marine Forces Special Operations Command
- MCRL: Marine and Coastal Research Laboratory
- MEBT: Medium Energy Beam Transport
- MFEnet: Magnetic Fusion Energy Network
- MICCoM: Midwest Integrated Center for Computational Material
- MicroBooNE: Micro Booster Neutrino Experiment
- MILNET: Military Network
- MINERvA: Main Injector Experiment for ν-A
- MiniBooNE: Mini Booster Neutrino Experiment
- MINOS: Main Injector Neutrino Oscillation Search
- MIT: Massachusetts Institute of Technology
- MJ-12: Majestic 12
- MM&D: Materiel, Maintenance, and Distribution
- MOD: Ministry of Defense
- MOS: Military Operational Specialty
- MP: Member of Parliament
- MPC: Materials Preparation Center
- MRI: Midwest Research Institute
- MRR: Medical Research Reactor
- MSA: Mission Support Activity
- MSL: Marine Sciences Laboratory
- MSRE: Molten-Salt Reactor Experiment
- MTGL: MultiThreaded Graph Library
- Mu2e: Muon-to-Electron Conversion Experiment
- MUFON: Mutual Unidentified Flying Object Network
N
- NACA: National Advisory Committee for Aeronautics
- NAL: National Accelerator Laboratory
- NARA: National Archives and Records Administration
- NASA: National Aeronautics and Space Administration
- NASIC: National Air and Space Intelligence Center
- NATO: North Atlantic Treaty Organization
- NAVSYCOM
- NAWI: National Alliance for Water Innovation
- NBC: National Bioenergy Center
- NBS: National Bureau of Standards
- NCN: North Atlantic Treaty Organization Core Network
- NCPV: National Center for Photovoltaics
- NCR: National Capital Region
- NCRCC: National Capital Region Coordination Center
- NDAA: National Defense Authorization Act
- NDE: Near Death Experience
- NE: Office of Nuclear Energy
- NEON: National Ecological Observatory Network
- NEOS: Network Enabled Optimization System
- NERSC: National Energy Research Scientific Computing Center
- NETL: National Energy Technology Laboratory
- NGA: National Geospatial-Intelligence Agency
- NHI: Non-human Intelligence
- NHMFL: National High Magnetic Field Laboratory
- NIC: Network Information Center
- NICAP: National Investigations Committee On Aerial Phenomena
- NIDSci: National Institute for Discovery Science
- NIPRNet: Non-classified Internet Protocol (IP) Router Network
- NIST: National Institute of Standards and Technology
- NLCTA: Next Linear Collider Test Accelerator
- NMR: Nuclear Magnetic Resonance
- NNSA: National Nuclear Security Administration
- NOAA: National Oceanic and Atmospheric Administration
- NOCS: Nucleo Operativo Centrale di Sicurezza
- NORAD: North American Aerospace Defense Command
- NORTHCOM: Northern Command
- NOVA: Neutrinos at the Main Injector Off-Axis νe Appearance
- NPF: Nuclear and Particle Futures
- NPR: Nuclear Posture Review
- NPS: National Park Service
- NRC: Nuclear Regulatory Commission
- NREL: National Renewable Energy Laboratory
- NRL: Naval Research Laboratory
- NRO: National Reconnaissance Office
- NSA: National Security Agency
- NSF: National Science Foundation
- NSFNET: National Science Foundation Network
- NSLS: National Synchrotron Light Source
- NSRL: National Aeronautics and Space Administration Space Radiation Laboratory
- NSS: National Security Strategy
- NSWDG: Naval Special Warfare Development Group
- NSTX: National Spherical Torus Experiment
- NTSB: National Transportation Safety Board
- NuMI: Neutrinos at the Main Injector
- NURO: National Underwater Reconnaissance Office
- NUFORC: National Unidentified Flying Object Reporting Center
- NWTC: National Wind Technology Center
O
- OC&R: Operations, Commitments, and Requirements
- OCAC: Office of Chief of the Air Corps
- ODNI: Office of the Director of National Intelligence
- OMS: Office of Military Support
- ORACLE: Oak Ridge Automatic Computer and Logical Engine
- ORBITEC: Orbital Technologies Corporation
- ORNL: Oak Ridge National Laboratory
- OSD: Office of the Secretary of Defense
- OSIS: Open Source Information System
- OSTP: Office of Science and Technology Policy
- OSWR: Office of Scientific and Weapons Research
- OT&R: Operations, Training and Requirements
- OTS: Officer Training School
- OTU: Operational Training Unit
P
- P5: Particle Physics Project Prioritization Panel
- PEAD: Presidential Emergency Action Document
- PEP: Positron-Electron Project
- PFF: Pulsed Field Facility
- PIP: Proton Improvement Plan
- PNL: Pacific Northwest Laboratory
- PNNL: Pacific Northwest National Laboratory
- POTUS: President of the United States
- PPI: Plan Position Indicator
- PPPL: Princeton Plasma Physics Laboratory
- PLT: Princeton Large Torus
- PV: Photovoltaic
- PWIN: Prototype Worldwide Military Command and Control System Intercomputer Network
Q
- QESST: Quantum Energy and Sustainable Solar Technologies
R
- RADAR: Radio Detection and Ranging
- RADM: Rear Admiral
- RAF: Royal Air Force
- RF: Radio Frequency
- RFQ: Radio-Frequency Quadrupole
- RHIC: Relativistic Heavy Ion Collider
- RMWMF: Radioactive and Mixed Waste Management Facility
- RNA: Ribonucleic Acid
- ROC: ReadOut Controller
- RRC: Regimental Reconnaissance Company
- RRD: Regimental Reconnaissance Detachment
- RTU: Replacement Training Unit
- RV: Remote Viewing
S
- SAA: Studies and Analysis Activity
- SACEUR: Supreme Allied Commander, Europe
- SAIC: Science Applications International Corporation
- SAP: Special Access Program
- SAPOC: Special Access Program Oversight Committee
- SAR: Special Access Required
- SBC: Structural Biology Center
- SBIRS: Space Based Infrared System
- SBND: Short-Baseline Neutrino Detector
- SBU: Sensitive but Unclassified; Stony Brook University
- SCHFCA: South Carolina Hydrogen & Fuel Cell Alliance
- SCI: Sensitive Compartmented Information
- SciBooNE: SciBar Booster Neutrino Experiment
- SCIF: Sensitive Compartmented Information Facilities
- SED: Systems Exploitation Detachment
- SEGA: Southwest Experimental Garden Array
- SEI: Scientific Engineering Institute
- SERF: Solar Energy Research Facility
- SETI: Search For Extraterrestrial Intelligence
- SF: Special Forces
- SIPDIS: SIPRnet Distribution
- SIPRNet: Secret Internet Protocol Router Network
- SLAC: Stanford Linear Accelerator Center
- SLATEC: Sandia, Los Alamos, Air Force Weapons Laboratory Technical Exchange
- SLD: Stanford Linear Accelerator Center Large Detector
- SMART: State Messaging and Archival Retrieval Toolset
- SNC: Sierra Nevada Corporation
- SNL: Sandia National Laboratories
- SNR: Supernoca Remnant
- SNS: Spallation Neutron Source
- SOC: Security Operations Center
- SOCOM: Special Operations Command
- SOCEUR: Special Operations Command Europe
- SOD: Special Operations Division
- SOFTE: Support Operations Task Force Europe
- SONAR: Sound Navigation and Ranging; Sonic Navigation and Ranging
- SoS: Science of Signatures
- SPHINX: Short Pulsed High Intensity Nanosecond X-Radiator
- SQMS: Superconducting Quantum Materials and Systems
- SR: Special Reconnaissance
- SRF: Superconducting Radio Frequency
- SRG: Senior Review Group
- SRI: Stanford Research Institute
- SRNL: Savannah River National Laboratory
- SRS: Savannah River Site
- SSRL: Stanford Synchrotron Radiation Lightsource
- STE: Secure Terminal Equipment
- STF: Subterranean Facility
- STU: Secure Telephone Unit
- SUN UP: Solar University-National lab Ultra-effective Program
- SURA: Southeastern Universities Research Association, Inc.
- SURF: Sanford Underground Research Facility
- SWIFT: Scaled Wind Farm Technology
- SWR: Skinwalker Ranch
T
- TA: Technical Area
- TAG: Talented and Gifted
- TCPDU: Thermochemical Process Development Unit
- TCUF: Thermochemical Users Facility
- TDC: Time to Digital Converter
- TDETR:
- TI: Texas Instruments
- TFTR: Tokamak Fusion Test Reactor
- TJNAF: Thomas Jefferson National Accelerator Facility
- TMI: Three Mile Island; Three Mile Island Nuclear Generating Station
- TRW: Thompson Ramo Wooldridge Inc.
- TS: Top Secret
- TSA: Technical Service Agreements
- TTSA: To The Stars Academy
- TUO: Technology of Unknown Origin
- TVA: Tennessee Valley Authority
U
- UAP: Unidentified Anomalous Phenomena (Current); Unidentified Aerial Phenomena (Old), Unit Airspace Plan, United Arab Emirates Police, Unified Action Partner
- UAPDA: Unidentified Anomalous Phenomena Disclosure Act
- UAPTF: Unidentified Aerial Phenomena Task Force
- UAS: Unmanned Aircraft Systems, Uncrewed Aviation Systems
- UA-UPJPO: Unidentified Aerospace-Undersea Phenomena Joint Program Office
- UAV: Unmanned Aerial Vehicle
- UC: University of California
- UFO: Unidentified Flying Object
- UFOB: Unidentified Flying Object
- UPO: Unidentified Phenomena or Objects
- URA: Universities Research Association
- USA: United States Army
- USAAF: United States Army Air Forces
- USAF: United States Air Force
- USAFE: United States Air Forces in Europe
- USAFRICOM: United States Africa Command
- USAISA: United States Army Intelligence Support Activity
- USAP: Unacknowledged Special Access Program
- USASOC: United States Army Special Operations Command
- USCG: United States Coast Guard
- USCINCEUR: United States Commander-in-Chief Europe
- USEUCOM: United States European Command
- USFET: United States Forces European Theater
- USG: United States Government
- USGS: United States Geological Survey
- USMC: United States Marine Corps
- USN: United States Navy
- USNORTHCOM: United States Northern Command
- USO: Unidentified Submerged Object
- USSF: United States Space Force
- USSOCOM: United States Special Operations Command
- UV: Ultraviolet
V
- VADM: Vice Admiral
- VLF: Very Low Frequency
- VoIP: Voice over Internet Protocol
- VoSIP: Voice over Secure Internet Protocol
- VTK: Visualization Toolkit
W
- WAAC: Women's Army Auxiliary Corps
- WAC: Women's Army Corps
- WASP: Women Airforce Service Pilot
- WDGS: War Department General Staff
- WFO: Work for Others
- WFTC: Western Flying Training Command
- WIN: Worldwide Military Command and Control System Intercomputer Network
- WIP: Waste Isolation Pilot Plant
- WIS: Worldwide Military Command and Control System Information System
- WS: Weapons Systems
- WTTC: Western Technical Training Command
- WWMCCS: Worldwide Military Command and Control System
X
Y
Z