| Acronym | Definition |
|---|
| BTA | Bicycle Transportation Alliance (AU) |
| BTA | Board of Tax Appeals (IRB) |
| BTA | Board of Tax Appeals (now Tax Court) |
| BTA | Bata (SIL code, Nigeria) |
| BTA | Barbados Tourism Authority |
| BTA | Bilateral Trade Agreement |
| BTA | Basic Trading Area (FCC - PCS) |
| BTA | Bollettino Telematico dell'Arte |
| BTA | Benzotriazole |
| BTA | Botswana Telecommunications Authority |
| BTA | Bureau des Technologies d'Apprentissage (Canadian office of learning technologies) |
| BTA | Brevet de Technicien Agricole (French: Agricultural Technician Certificate) |
| BTA | Bicycle Transportation Account (Canada) |
| BTA | Bank TuranAlem (Kazakhstan) |
| BTA | Border Trade Alliance |
| BTA | Biological Terrain Assessment |
| BTA | Bulgarian Telegraph Agency (Bulgarian News Agency) |
| BTA | Better Than Average |
| BTA | Belgian Teleworking Association |
| BTA | Binding-Time Analysis |
| BTA | Bladder Tumor Associated Antigen |
| BTA | Berkeley Training Associates |
| BTA | Black Tie Affair |
| BTA | Banco Totta & Açores (Portuguese bank) |
| BTA | Best Time Available |
| BTA | Blue Tide Aquatics (Texas) |
| BTA | Behold the Arctopus (band) |
| BTA | Bachelor of Tourism Administration (India) |
| BTA | Best Technical Approach |
| BTA | Bible Translation Association (est. 1974; Papua New Guinea) |
| BTA | Better Than All (band) |
| BTA | Biological Threat Agent |
| BTA | Bond Traders Association |
| BTA | Bass Tab Archive |
| BTA | Brunswick Transit Alternative (Ohio) |
| BTA | Boiler Tube Company of America |
| BTA | Beijing Telecommunications Administration |
| BTA | Big Telescope Alt-azimuthal |
| Bta | Bacillus Thuringiensis Aizawai |
| BTA | Boulder Tennis Association |
| BTA | Ballet Theatre Afrikan |
| BTA | Business Target Agreement |
| BTA | Bois Transformés d'Aquitaine (French wood product manufacturer) |
| BTA | Bio Threat Alert |
| BTA | B-ISDN Terminal Adapter |
| BTA | Bulletin Technique Apicole |
| BTA | British Thematic Association |
| BTA | Berkeley Technology Associates |
| BTA | Breakthrough to the Aging |
| BTA | Biomagnetic Therapy Association |
| BTA | Boston Tufts Alliance |
| BTA | Brooklyn Talmudical Academy |
| BTA | Benzoyltrifluoroacetone (chemistry) |
| BTA | Baker Technology Associates |
| BTA | Baltimore Theater Alliance |
| BTA | Brownsville Tennis Association |
| BTA | British Taoist Association |
| BTA | Bretagne TransAmérica (French heritage association) |
| BTA | Basic Travelers Allowance |
| BTA | Behavioral Targeting Advertising |
| BTA | Be There Always |
| BTA | Budget Transfer Allocation |
| BTA | Basic Technical Applications |
| BTA | British Transport Advertising |
| BTA | Broadband Telecommunications Architecture (Sprint) |
| BTA | Bath Teachers Association |
| BTA | Bicycle the Americas |
| BTA | Burst Transport Mode Architecture |
| BTA | Blanket Tension Assembly |
| BTA | Battle Training Assembly |
| BTA | Best Theatre Arts |
| BTA | Bon de Trésor par Adjudication (French: Purchase Award by Treasury; Madagascar) |
| BTA | Bubble Tanks Arena (game) |
| BTA | Blaine Turner Advertising, Inc. |
| BTA | Building Together Association (Thailand) |
| BTA | Business Transformation Associates (Canada) |
| BTA | Biotechnica America |
| BTA | Bio-Terrorism Act of 2002 (US) |
| BTA | Big Time Audio |
| BTA | Be There Aloha |
| BTA | Bâtiment et Techniques d'Armor (French construction company) |
| BTA | Bordeaux Tourisme Affaires (French: Bordeaux Tourism Business; Bordeaux, France) |
| BTA | Bâtiment Technique Artisanal (French construction company) |
| BTA | Billion-Transistor Architecture |
| BTA | British Thyroid Association |
| BTA | British Triathlon Association |
| BTA | Boyce Thompson Arboretum |
| BTA | Bachelor of Theatre Arts (various schools) |
| BTA | British Tinnitus Association |
| BTA | Business Transformation Agency (US DoD) |
| BTA | British Toilet Association |
| BTA | Business Technology Associates |
| BTA | Breakthroughs Abroad |
| BTA | British Trout Association |
| BTA | Beyond the Ashes (band) |
| BTA | Burbank Teachers Association |
| BTA | Business Technology Association |
| BTA | Business Travel Account |
| BTA | But Then Again |
| BTA | Broadband Terminal Adapter (B-ISDN) |
| BTA | British Tourist Authority |
| BTA | Bolshoi Teleskop Azimutalnyi (Russian telescope) |
| BTA | Brain Tumor Action |
| BTA | Bow-Tie Antenna |
| BTA | Building Trades Association |
| BTA | Bacon, Tomato, Avocado (sandwich) |
| BTA | Bruce Trail Association (Canada) |
| BTA | Budget Turnaround |