BTL may refer to: General abbreviations Bachelor of Talmudic Law, an academic degree Bilateral tubal ligation, a medical procedure Biomass to liquid, synthesize of fuel from biomass Bridge-tied load, an output configuration for audio amplifiers Buy-to-let, a UK property investment strategy Location codes Battle Creek (Amtrak station), Amtrak station code BTL, Battle Creek, Michigan W. K. Kellogg Airport, IATA identifier BTL, Battle Creek, Michigan Companies BACnet Testing Laboratories Belize Telecommunications Limited Bell Telephone Laboratories Between the Lines Books, Canadian publisher BTL Brands, developer of McCoy's (crisp) See also Below the line (disambiguation)