NB, Nb, or nb may refer to:
The National Broadcasting Company (NBC) is an American English-language commercial terrestrial radio and television network that is a flagship property of NBCUniversal, a subsidiary of Comcast.
NBC Sunday Night Football (abbreviated as SNF) is a weekly television broadcast of National Football League (NFL) games on NBC in the United States.
NBCSN is an American pay television channel that is owned by the NBC Sports Group division of NBCUniversal.
NBC News is the news division of the American broadcast television network NBC. The division operates under NBCUniversal Broadcast, Cable, Sports and News, a subsidiary of NBCUniversal, in turn a subsidiary of Comcast.
NBC Sports is an American programming division of the broadcast network NBC, owned and operated by NBC Sports Group division of NBCUniversal and subsidiary of Comcast, that is responsible for sports broadcasts on the network, and its dedicated national sports cable channels.