BT may stand for: British Telecom, now known as the BT group BitTorrent, a peer-to-peer file sharing protocol BT (musician), stage name of electronica musician Brian Wayne Transeau BT tank, any of a series of Soviet military tanks Baal teshuvah, a Jew who became Orthodox (female version: Ba'alat teshuvah) Bacillus thuringiensis, a bacterium which forms Bt toxins Baronet, a title in the British honours system abbreviated Bt Barton County, Kansas, as known by its ISO country code BT and internet domain .bt Binary tree, a data structure Blessed Trinity Catholic High School, a High School in Georgia Body thetan, part of Scientology doctrine Burton Taylor Theatre, known as The BT, in Oxford, United Kingdom Blacksburg Transit, the bus service