BGM-71 TOW ,"Tube-launched Optically-tracked Wire-to-command-Link" guided Missile Set.

The BGM-71 TOW is an anti-tank guided missile. "TOW" stands for "Tube-launched Optically-tracked Wire-to-command-Link" guided Missile Set. The TOW was first produced in 1970 and is the most widely used anti-tank guided missile in the world.

The TOW is designated as a BGM by the US military. By its very definition, a BGM is a Multiple Launch Environment (B) Surface Attack (G) Guided Missile (M). The B launch environment prefix is used only when the system can be used essentially unmodified when launched from a variety of launch platforms.
The M151 and M220 launchers are used by infantry, but can also be mounted on a number of vehicles, including the M151 jeep, the M113 APC, the M966 HMMWV and the M1045 HMMWV (which replaced the M966). These launchers are theoretically man-portable, but are quite bulky. The updated M151 launcher was upgraded to include thermal optics to allow night time usage, and had been simplified to reduce weight. The M220 was specifically developed to handle the TOW-2 series.
TOW systems have also been developed for vehicle specific applications on the M2/M3 Bradley IFV/CFV, the M1134 Stryker ATGM carrier, and the now obsolete M901 ITV (Improved TOW Vehicle); they are generally referred to as TOW Under Armor (TUA).
In helicopter applications, the M65 system used by the AH-1 series is the primary system deployed, but the XM26 system was developed for the UH-1, and a system was put into development for the later canceled AH-56 helicopter.