BSI
BSI most often identifies the British Standards Institution, the UK body that develops and publishes technical standards, while the same letters also appear in the names of various software firms and commercial enterprises.
Medical
Body Substance Isolation
Behaviour Status Inventory
Behavioural Science Institute
bloodstream infection
Bound Serum Iron
Brief Symptom Inventory Psychology
British Society for Immunology
Miscellaneous
Baker Street Irregulars
Body Systems Interface
Built in Systems interface
Basic Skills Improvement
Bodily Substance Isolation
Community
British Standards Institution
Basic Skills Instruction
Basketball School of Instruction
BlindSkills, Inc.
Bible Society of India
Brooklyn School of Inquiry
Governmental
Battlefield Systems Institute (or Integration)
Basic Shipping Instructions
Boeing Services International, Inc.
Base Support Installation
British Standard Institute
Academic & Science
Computing
Internet
Business
Israel, LTD.
Best Solutions Inc
Brandon Systems Institute
Bancado Systems Incorporated
Bob Smith Industries
Buck Sales, Inc.
Building Stone Institute
Billing System Investigation
Bank Saderat Iran
Beyond Sportswear International Ltd
Bentley Systems, Incorporated
Business Software Inc
Building Service Inc
Business Scenario Investigations