text: Chapter 2
  Bolded entries apply only to the Army. An asterisk (*) marks terms shown in chapter 1.
  IAW in accordance with
  IBCT infantry brigade combat team
  IBS integrated broadband system
  IC *intelligence community
  ICO installation contracting office
  ICRC International Committee of the Red Cross
  ICS *incident command system
  ID infantry division, *identification
  IDAD *internal defense and development
  IDN initial distribution number
  IDP *internally displaced person
  IE information engagement
  IED *improvised explosive device
  IEM installation emergency management
  IFF identification, friend or foe
  IGO *intergovernmental organization
  IMCOM United States Army Installation Management Command
  IMET *international military education and training
  IMINT *imagery intelligence
  IMT initial military training
  INSCOM United States Army Intelligence and Security Command
  IO *information operations
  IP initial position
  IPB *intelligence preparation of the battlefield, *intelligence
  preparation of the battlespace
  IPDS *inland petroleum distribution system
  IPE *individual protective equipment
  IPERMS Interactive Personnel Electronic Records Management System
  IPFU individual physical fitness uniform
  IPI *indigenous populations and institutions
  IPOE intelligence preparation of the operational environment
  IR *information requirements, infrared
  IRC internet relay chat, *information-related capability
  IRR Individual Ready Reserve
  ISB *intermediate staging base
  ISOPREP *isolated personnel report
  ISR *intelligence, surveillance, and reconnaissance
  ITO installation transportation officer
  ITV *in transit visibility
  IW *irregular warfare
  —J—
  J-2 intelligence directorate of a joint staff
  J-3 operations directorate of a joint staff
  J-4 logistics directorate of a joint staff
  J-5 plans directorate of a joint staff
  J-6 communications system directorate of a joint staff
  JAAT *joint air attack team