The following abbreviations are used throughout My CFI Book without being spelled out.
AC: Advisory Circular
ACS: Airman Certification Standards
ADIZ: Air Defense Identification Zone
ADS-B: Automatic Dependent Surveillance-Broadcast
AFM: Airplane Flight Manual
AGL: Above Ground Level
AIM: Aeronautical Information Manual
AMEL: Airplane Multi-Engine Land
AMES: Airplane Multi-Engine Sea
ASEL: Airplane Single-Engine Land
ASES: Airplane Single-Engine Sea
ASOS: Automated Surface Observing System
ATC: Air Traffic Control
ATIS: Automatic Terminal Information Service
ATP: Airline Transport Pilot
AWOS: Automated Weather Observing System
CFI: Certificated Flight Instructor
CFII: Certificated Flight Instructor-Instrument
CFR: Code of Federal Regulations
CG: Center of Gravity
DA: Decision Altitude
DH: Decision Height
ELT: Emergency Locator Transmitter
ETA: Estimated Time of Arrival
ETE: Estimated Time En Route
FAA: Federal Aviation Administration
FBO: Fixed Base Operator
FPM: Feet Per Minute
FPNM: Feet Per Nautical Mile
FSIMS: Flight Standards Information Management System
FSS: Flight Service Station
GA: General Aviation
GPS: Global Positioning System
IACRA: Integrated Airman Certification and/or Rating Application
ICAO: International Civil Aviation Organization
InFO: Information for Operators
IFR: Instrument Flight Rules
IMC: Instrument Meteorological Conditions
KCAS: Knots Calibrated Airspeed
KTAS: Knots True Airspeed
KIAS: Knots Indicated Airspeed
LSA: Light-Sport Aircraft
MDA: Minimum Descent Altitude
MEA: Minimum En Route Altitude
MEI: Multi-Engine Instructor
METAR: Meteorological Terminal Aviation Routine (Weather Report)
MSA: Minimum Safe Altitude
MSL: Mean Sea Level
NAVID: Navigational Aid
NDB: Nondirectional Radio Beacon
NM: Nautical Mile
NOTAM: Notice to Air Missions
NTSB: National Transportation Safety Board
PIC: Pilot in Command
POH: Pilots Operating Handbook
PTS: Practical Test Standards
SAIB: Special Airworthiness Information Bulletins
SAFO: Safety Alerts for Operators
SID: Standard Instrument Departure
SM: Statute Mile
STAR: Standard Terminal Arrival Route
TAF: Terminal Area Forecast
TERPS: U.S. Standard for Terminal Instrument Procedures
UTC: Universal Coordinated Time
VDP: Visual Descent Point
VFR: Visual Flight Rules
VMC: Visual Meteorological Conditions
VOR: Very High Frequency Omni-Directional Range
WAAS: Wide Area Augmentation System