Billing and Order Support System
battlefield operating systems
Back Office Support System
Book of SEMI Standards
Base Operations Support System
Better Opportunities for Single Soldiers
binary object storage system
Bioastronautic Orbiting Space Station
Business Operations Support System
BUSINESS ORIENTED SOFTWARE SYSTEM
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Badge Office Security System
Badge Office Security Sytem
Ballistic Offensive Suppression System
Base Operating Supply System
Base Operation Support Services
Basic Operating System Software
Basic OS Software for BASIC
Batch Operating Software System
Battle Operations Support System
Battlefield Operations Support System
Battlefield Operations System Simulation
Behavior of Offshore Structures, Conference on
Being On Ships Sucks
Benthic Organic Seston Sampler
Best on Open Systems Solutions
Better Opportunities for Single Servicemembers
Billing and Order Support Systems
Binary Object Streaming Service
Bio-Optic Synthetic System
Boat Outfit and System Support
Bomb On Station Switch
Bonn Open Synthesis System
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Brinell Optical Scanning System
British Office Stationery Supplies
British Orthopaedic Spine Society
Broadband Operations Support System
Brother Of Sexy Sister
BSI OSS Security Suite