An active protection system (APS) is a system designed to actively prevent certain anti-tank weapons from destroying a vehicle.
Merkava Mk IVm Windbreaker, fitted with Trophy APS
An anti-tank guided missile (ATGM), anti-tank missile, anti-tank guided weapon (ATGW) or anti-armor guided weapon is a guided missile primarily designed to hit and destroy heavily armored military vehicles. ATGMs range in size from shoulder-launched weapons, which can be transported by a single soldier, to larger tripod-mounted weapons, which require a squad or team to transport and fire, to vehicle and aircraft mounted missile systems.
FGM-148 Javelin anti-tank missile of the United States Army
The 9M133 Kornet tripod-mounted ATGM of the Russian Ground Forces
The Brimstone missile is a fire-and-forget missile of the RAF
PARS 3 LR fire-and-forget missile of the German Army