NBC suit
An NBC (nuclear, biological, chemical) suit, also called a chemsuit or chem suit or chemical suit is a type of military personal protective equipment. NBC suits are designed to provide protection against direct contact with and contamination by radioactive, biological or chemical substances, and provides protection from contamination with radioactive materials and some types of radiation, depending on the design. It is generally designed to be worn for extended periods to allow the wearer to fight (or generally function) while under threat of or under actual nuclear, biological, or chemical attack. The civilian equivalent is the Hazmat suit. The term NBC has been replaced by CBRN (chemical, biological, radiological, nuclear), with the addition of a new threat, radiological, meaning radiological weapon.
NBC Radio Network
NBC and RCA were one of the key forces in the development of television in the 1930s and 1940s, dating back to New York City experimental station W2XBS in 1928. Before the American entry into World War II in 1941, W2XBS was officially licensed as WNBT. By the late 1940s, NBC would complement most of its owned-and-operated stations with an adjunct FM signal and a television counterpart.