The following abbreviations and acronyms are used in this study guide.  Remote Pilot – Small Unmanned Aircraft Systems Study Guide  78  Abb./Acronym  Definition  14 CFR Title 14 of the Code of Federal Regulations  AC Advisory Circular  ACS  Airman Certification Standards  ADDS  Aviation Digital Data Services  ADIZ  Air Defense Identification Zone  ADM  Aeronautical Decision-Making  AFM  Airplane Flight Manual  AFS  Flight Standards Service  AGL Above Ground Level  AIRMET  Airman’s Meteorological Information  AOA  Angle of Attack  ATC Air Traffic Control  ATD  Aviation Training Device  CB  Cumulonimbus  CFA  Controlled Firing Areas  CFR  Code of Federal Regulations  CG  Center of Gravity  CP  Center of Pressure  CRM  Crew Resource Management  CTAF  Common Traffic Advisory Frequency  CTP  Certification Training Program  DPE  Designated Pilot Examiner  DVFR  Defense VFR  EMS  Emergency Services  FAA Federal Aviation Administration  FADEC  Full Authority Digital Engine Control  FDA  Federal Drug Administration  FDC  Flight Data Center  Appendix 3:  Abbreviations and Acronyms 