A/C     - Air Commanding
ADC     - Air Defence Command
ADGp    - Air Defence Group 
ADM     - Air Defence Ministry
AECB    - Atomic Energy Control Board
AFHQ    - Air Force Headquarters
AFOSI   - Air Force Office of Special
          Investigations on Aerial Phenomenon
AFRO    - Air Force Regular Orders
ALB,ALTA - Alberta
AOC     - Air Officer Commanding
ASST    - Assistant
ATIC    - Air Technical Intelligence Center
ATC     - Air Transport Command
AVRO    - A. V. Roe Ltd.
BC      - British Columbia
CAA     - Civil Aviation Authority
CAC     - Chief Air Command
CANAIRHED - Canadian Air Force Headquarters
CAS     - Chief Air Staff
CBC     - Canadian Broadcasting Corporation
CDRB    - Chairman of Defence Research Board
CFAO    - Canadian Forces Administration Order
CIB     - Criminal Investigation Branch
CIRVIS  - Communications Instructions Reporting 
          Vital Intelligence Sightings
CJS     - Canadian Joint Staff
CMM     - Comma (,) in telegrams
C.O.    - Commanding Officer
CPL     - Constable
DADO    - Directorate of Air Defence Operations
DAI     - Directorate of Air Intelligence
DIA     - Defense Intelligence Agency
DM      - Deputy Minister
DMI     - Directorate of Military Intelligence
DND     - Department of National Defence
DNI     - Directorate of Naval Intelligence
DOT     - Department of Transportation
DPR     - Directorate of Public Relations
DRB     - Defense Research Board
DSI     - Directorate of Scientific Intelligence
F/L     - Flight Lieutanant
FLD     - Field (Air Field)
F/O     - Field Officer
F/S     - Flying Saucer
G/A     - General Aviation
G/C     - Group Captain
GpCdr   - Group Commander

HQ      - Headquarters
i/c     - In Charge
JANAP   - Joint Air, Naval, Army Publication
JCEC    - Joint Communication Electronics Committee
JIC     - Joint Intelligence Committee
LCdr    - Lieutenant Commander
MAN     - Manatoba
MERINT  - UFO Reports from Marine Sources
NASP    - National Aero-space Plane
NATO    - North Atlantic Treaty Organization
NB      - New Brunswick 
NCO     - Non-Commissioned Officer
NDOC    - National Defence Operations Centre
NEPA    - Nuclear Energy Proplulsion of Aircraft
NFLD    - Newfoundland
NICAP   - National Investigative Committee
          on Aerial Phenomenon
NORAD   - North American Aerospace Defense Command
NRC     - National Research Council
NS      - Nova Scotia 
NWT     - North West Territories 
O.C.    - Officer Commanding 
ON, ONT - Ontario  
OPS     - Operations 
PD      - Period (.) in Telegrams 
PEI     - Prince Edward Island  
PQ      - Quebec
PRO     - Public Relations Officer
PSS     - Project Second Storey
RCAF    - Royal Canadian Air Force
REED    - Radio Electrical Engineering Dept of NRC
REVIS   - Reporting of Vital Intelligence Sightings
PSS     - Project Second Story
SAR     - Search and Rescue
SASK    - Saskatchewan
ScD     - Science Director
SGT     - Sargent
S/D     - Sub-Division
S/L     - Squadron Leader
S/R     - Sighting Report
STN     - Station
TCHQ    - Technical Headquarters
UAR     - Upper Atmosphere Research of NRC/REED
UFO,UFOB - Unidentified Flying Object
WBS     - Wilbert B. Smith
W/C     - Wing Commander