There are currently 3 main television standards used throughout the world:
NTSC - National Television Standards Committee. Developed in the USA. First used in 1954. Consists of 525 horizontal lines of display. PAL - Phase Alternating Line. Developed in the United Kingdom & Germany. First used in 1967. Consists of 625-line display. SECAM - Système Électronique pour Couleur avec Mémoire. Developed in France. First used in 1967. Consists of 625-line display.
PAL - Phase Alternating Line. Developed in the United Kingdom & Germany. First used in 1967. Consists of 625-line display.