In the acronym NTSC, used in the television industry, what does the "S" stand for?

Question

What does the "P" stand for in the acronym "PDA", that refers to a small computer that has the ability to connect to the internet?

Answer 1

NTSC MEANS NATIONAL TELEVISION SYSTEM COMMITTEE
SO S=SYSTEM

Answer 2

System
NTSC, named for the National Television System Committee, is the analog television system used in most of the Americas, Japan, South Korea, Taiwan, Burma, and in some places in the Pacific Ocean.