ATGM is an abbreviation for anti-tank guided missile. Wire guided anti-tank guided missiles were invented by the French in the 1950s, and were a revolutionary anti-tank weapon. The missiles are 'flown' by the gunner to ranges of 3000 or 4000 metres with very high accuracy. The heavier vehicle or tripod launched missiles have HEAT warheads that pene... Found on http://www.probertencyclopaedia.com/browse/FYA.HTM