NB or Nb may refer to:
The National Broadcasting Company (NBC) is an American English language commercial broadcast 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, formerly known as the National Broadcasting Company when it was founded on radio.
NBC Sports is the programming division of the American broadcast network NBC, owned by the NBCUniversal Television Group division of NBCUniversal, that is responsible for sports broadcasts on the network, and its dedicated national sports cable channels.