an abbreviation, refers specifically to National TelevisionSystem Committee that sets TV and video standards; also refers to the US and Japanese video systems that have 525 horizontal scan lines, 16 million different colors, and 30 frames per second (or 60 half-frames (interlaced) per second); competing systems in Europe and worldwide arePAL (Phase Alternating Line) and SECAM (Sequential Color with Memory)
— Film Terms