0-9
A
- AAA
- anti-air craft artillery
- AAAS
- American Association for the Advancement of Science
- AAF
- Army Air Field
- AAPI
- Australian Aerial Phenomena Investigations
- AARO
- All-domain Anomaly Resolution Office
- AATIP
- Advanced Aerospace Threat Identification Program
- AAWSAP
- Advanced Aerospace Weapon System Applications Program
- ABIN
- Brazilian Intelligence Agency
- AC&W
- aircraft control and warning
- ACC-BS
- Brasília Area Control Center
- ACE
- chronological entry file (in portuguese – Arquivo Cronológico de Entradas)
- ACOS
- Australian coordination section of the J. Allen Hynek Center for UFO Studies (CUFOS)
- ACUFOS
- Australian Centre for UFO Studies (formerly ACOS)
- ACWRON
- Aircraft Control and Warning Radar Observation Network
- ADC
- Aerospace Defense Command, Air Defense Command
- ADF
- automatic direction finder
- ADOC
- Air Defense Operations Center
- AEC
- Atomic Energy Commission
- AESS
- Atomic Energy Security Service
- AESV
- Association d’Étude Sur les Souçoupes Volantes
- AFB
- Air Force Base
B
C
- CSETI
- Center for the Study of Extraterrestrial Intelligence
- CUFOS
- Center for UFO Studies
D
- DoD
- Department of Defense, now Department of War
- DoW
- Department of War, ex-Department of Defense
E
F
- FAA
- Federal Aviation Administration
- FOIA
- Freedom of Information Act
G
H
I
- IC
- Intelligence Community – A group of 18 U.S. government intelligence agencies, such as the FBI, NSA, and CIA, that contribute to intelligence on subjects including UAP analysis.
J
K
L
M
- MUFON
- Mutual UFO Network
N
- NASA
- National Aeronautics and Space Administration
- NHI
- Non-Human Intelligence
- NICAP
- National Investigations Committee on Aerial Phenomena
O
- ODNI
- Office of the Director of National Intelligence
- Overton Window
- A political framework describing the range of policies considered acceptable or respectable within mainstream public discourse at a given time.
P
- PIREPs
- Pilot Reports
Q
R
S
- SCU
- Scientific Coalition for UAP Studies
T
U
- UAP
- Unidentified Anomalous Phenomena (or Phenomenon)
- UAPTF
- Unidentified Aerial Phenomena Task Force
- UFO
- Unidentified Flying Object
V
W
X
Y
Z