Krav Maga, meaning contact combat, is a self-defense system originally created by Imi Lichtenfeld for the Israeli Defense Forces for military applications.
It is intended to be ever changing, and incorporates elements from Boxing, Savate, Muay Thai, Wing Chun, Judo, Jiu-Jitsu, and Wrestling. It has since been adapted for civilian and police applications, and most Krav Maga seen today is of the civilian variety.
Due to it's military roots, Krav Maga is designed to be learned quickly and by anyone. Many techniques are built upon natural reactions, like raising one's hands to protect oneself. Defensive techniques, like defending against a choke, share common moves, such as plucking irrespective of the direction of the incoming threat. This makes techniques more adaptable and less confusing. Krav Maga practitioners prefer to avoid complex techniques like throws, in favor of strikes.