International Board of Auditors for NATO (IBAN)

on-board digital computer / on-board computer

international humanitarian law (See international law of armed conflict)

International legion for the Defence of Ukraine (ILDU) / International Legion of Territorial Defence of Ukraine / Ukrainian Foreign Legion

International Military Sports Council (IMSC) / Conseil International du Sport Militaire (CISM)    

Logistics Coordination Board (LCB) (NATO)

Military Committee Joint Standardization Board (NATO)

delegation (of NATO member state at NATO HQ)

7.62×51mm NATO (official nomenclature 7.62 NATO)

across-the-board

board instrument

board of officers

Defense Board

Defense Science Board (DSB)

display board

draft board

functional capability board (FCB)

information operations coordination board (IOCB)

joint coordination board (JCB)

joint coordination board working group (JCBWG)

joint targeting coordination board (JTCB)

motion imagery standards board (MISB)

off-board sensors

on-board ammunition supply

on-board radar sight

on-board sensor

on-board spares

passenger on board (POB)

physical evaluation board

Research and Technology Board (RTB)

route card board

shoulder board

Technology Advisory Board