text: Acronyms, Abbreviations, and Country Codes
  Bolded entries apply only to the Army. An asterisk (*) marks terms shown in chapter 1.
  GP general purpose
  GPS *Global Positioning System
  GPW Geneva Convention Relative to the Treatment of Prisoners of War
  GR *grade resistance
  GS *general support
  GSB group support battalion
  GSR general support-reinforcing
  GSSC global satellite communications (SATCOM) support center
  GTL *gross trailing load, *gun-target line
  —H—
  HA humanitarian assistance
  HACC *humanitarian assistance coordination center
  HARM high-speed antiradiation missile
  HAZMAT hazardous materials
  HCA *humanitarian and civic assistance, *head of a contracting activity
  HCT human intelligence (HUMINT) collection team
  HD *homeland defense
  HE high explosive
  HEI high explosives incendiary
  HEMTT heavy expanded mobile tactical truck
  HF high frequency
  HHC headquarters and headquarters company
  HLZ helicopter landing zone
  HM hazardous material
  HMMWV high mobility multipurpose wheeled vehicle
  HN *host nation
  HNS *host nation support
  HOC *humanitarian operations center
  HPT *high-payoff target
  HPTL high-payoff target list
  HQ headquarters
  HQDA Headquarters, Department of the Army
  HR human resources
  HRF homeland response force
  HRP *high risk personnel
  HRSC human resources sustainment center
  HS *homeland security
  HSS *health service support
  HUMINT *human intelligence
  HVAA *high value airborne asset (protection)
  HVI high-value individual
  HVT *high value target
  HW *hazardous waste
  —I—
  IAA *incident awareness and assessment
  IAMD *integrated air and missile defense