Blood Alcohol Content bacterial artificial chromosome Blood Alcohol Concentration Boeing Aerospace Company Budget at Completion Back At Computer British Aircraft Corporation biological activated carbon Bioremediation Action Committee Biotechnology Advisory Committee Booster Assembly Contractor British Aerospace Corporation Budget Activity Code Business Availability Center baclofen Balanced Asynchronous Class Basic Access Control Battle Area Clearance Bell Aerospace Company Bicycle Advisory Committee Boeing Aerospace Corporation Boeing Aircraft Company Bordeaux Astrographic Catalog boric acid concentrator breath alcohol concentration British Association of Chemists British Association of Counselling Broadband Access Center Broadband Assurance Contact Budget Advisory Committee