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.
NBCSN is an American digital cable and satellite 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.
NBCUniversal, sometimes referred to as NBCU or NBCUni and formerly written as NBC Universal, is an American multinational media conglomerate that is a subsidiary division of Comcast.