juke box (розм.)

helicopter / (розм.) heli / helo / chopper (H; hel)

hole in (розм.)

telescopic sight; (розм.) scope

Fleet Satellite Communications (FSC, FLTSATCOM, розм. SATCOM)

human remains (розм. HR, as opposed to Human Resources)

floatwall combustion chamber (розм.)

aircraft floodlight / landing light, (розм.) ‘Nite-sun’

Point man (розм.)

jug (розм.)

juice (розм.)

juicy target (розм.)

air box handhole cover

ammunition box

axle box

battery box

box formation

box freight car

box magazine

box trail

brain box

control box / console / desk

dead letter-box

gearbox / gear box

grid reference box

Jack-in-the-box effect

junction box

pillbox (pill box)

wargaming methods / techniques (belt, avenue in depth, box, belt-in-time)

kill box

slip-ring box

staggered box magazine

ammunition box mouth