Bureau of Indian Standards 
Bureau of Industry and Security 
Bank for International Settlements 
Business Information System 
Border Intermediate System 
British Interplanetary Society 
Business Information Systems 
Battlespace Information System 
Boot Integrity Services 
Bremsstrahlung Isochromat Spectroscopy 
Broadcast Info System 
Budget Information System 
Bank of International Settlements 
Banking Information Service 
Biocide Injection System 
bispectral index 
Board of Inspection and Survey 
Boot Integrity Service 
Boundary Intermediate System 
Brain Injury Society 
Broadband Interactive System 
Broadcast Information System 
Brought Into Service 
Business Improvement Specialists 
Business Improvement Specialties 
Business Information Service 
Bachelor of Integrated Studies 
Bank for International Settlement 
Banning Independent Study 
Barratt Impulsiveness Scale