NTSC (National Television System Committee) is the analog television system used in the United States, Canada, Japan, Mexico, the Philippines, South Korea, Taiwan, and some other countries (see map). NTSC is also the name of the U.S. standardization body that adopted it.
PAL (Phase Alternating Line) is a colour-encoding system used in broadcast television systems in large parts of the world.
SECAM, also written SÉCAM (Séquentiel couleur à mémoire, French for “Sequential Color with Memory”), is an analog color television system first used in France. A team led by Henri de France working at Compagnie Française de Télévision (later bought by Thomson) invented SECAM. It is, historically, the first European color television standard.