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A&B

A&B may refer to:

Geography

Antigua and Barbuda (a small island nation in the Caribbean).

Communications protocol

• Refers to a bit signaling procedure used in SF (D4) framed T1 transmission facilities where one bit from the sixth and twelfth frame of each of 24 T1 subchannels is used for carrying supervisory signaling. On T1 lines that use ESF (Extended SuperFrame) framing, the signaling bits are robbed from the 6th, 12th, 18th, and 24th frame, resulting in "ABCD" signaling bits.

Criminal law

• The acronym and initialism represents assault and battery.

Music

• The abbreviation for the popular trance group Above & Beyond (band).