BT may stand for:

• BT , 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 state county code BT
• Bathythermograph, a device used to obtain a record of temperature against depth in the ocean
• Belfast, as known by its UK post code BT, also applies to the rest of Northern Ireland
• Bhutan, 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
• Billie Tyler, known as Tyler, Princetta, and the Maid of Honour.
• Blacksburg Transit, the bus service of Blacksburg, Virginia

Corporations

• BT Group, formerly known as British Telecommunications
• BT Industries AB, a Swedish forklift manufacturer, owned by Toyota Industries Corporation
• AirBaltic, an airline with the IATA code BT
• Banca Transilvania, a bank in Romania
• Bankers Trust, a banking organisation which operates as BT Financial Group in Australia
• Bee Train, Japanese animation studio
• Bitstream Inc., a type foundry, as known by the abbreviation for their fonts
• BitTorrent, a peer-to-peer file sharing protocol
• Bluetooth, a wireless personal area network standard
• Bodensee-Toggenburg-Bahn, a former Swiss railway company
• Bulgartabac, a Bulgarian tobacco producer

Media

• BT a fictional character from the anime .hack//SIGN
• B.T. , a Danish tabloid newspaper
• Bergens Tidende, a Norwegian newspaper
• Baseball Tonight, a baseball program on ESPN
• Borås Tidning, the newspaper of Borås, Sweden
• Breakfast Television, a Canadian morning television program also known as BT
• Business Times, either of two newspapers published in Singapore and Malaysia
• Buck-Tick, a Japanese band
• BT , an album by Buck-Tick
• Billy Talent, a Canadian band from Ontario, sometimes abbreviated "BT"

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