BTK, Btk, etc. may refer to:

People

Dennis Rader, an American serial killer nicknamed "BTK" (for "bind, torture, kill")

Biology and medicine Bacillus thuringiensis kurstaki (Btk), a soil-dwelling bacterium also used as an insecticide Bruton's tyrosine kinase, a protein Btk-type zinc finger or Btk motif (BM), a zinc-binding motif present in some eukaryotic signalling proteins

Medicine

BTK (below-the-knee amputation), amputation of the lower limb between the knee joint and the ankle joint

Music "BTK", a song by American band Exodus on their 2014 album Blood In, Blood Out "B.T.K. (Dennis Rader)", a song by Japanese band Church of Misery on their 2013 album "Thy Kingdom Scum" "Bind Torture Kill", a song by American band Suffocation on their 2006 self-titled album Bind, Torture, Kill, a 2006 album by Belgian band Suicide Commando Birth Through Knowledge, a Canadian hip-hop/rock band

Telecommunications Bulgarian Telecommunications Company, (БТК in Cyrillic) Information and Communication Technologies Authority in Turkey, (abbreviated as BTK in Turkish)

Transportation Baku–Tbilisi–Kars railway connecting Azerbaijan, Georgia and Turkey ICAO airline code for Indonesian airline Batik Air IATA airport code for Bratsk Airport, Russia

Other uses BTK, the ISO 639-2 and ISO 639-5 codes for Batak languages Kaiser-Fleetwings XBTK, a US Navy dive and torpedo bomber Pillars of Truth (Boutokaan Te Koaua), a political party in Kiribati

See also Born to Kill (disambiguation)