Office Automation Technology and Servi…
Officers Advanced Training School
Open Air Test Site
Open Area Test Site
Optical Alignment Transfer System
Options Automated Trading System
orbit and attitude tracking system
Orbiter Avionics Tracking System
Obligations Assimilables du Trésor
Office Automation and Technology Servi…
Office Automation Technology and Servi…
Online AIF Transaction System
Online Allowance Transfer System
Operation Assignments Tracking System
Operations Analysis for Tactical Suppo…
Optical Attenuation Test Set
OPTICAL ATTITUDE TRANSFER SYSTEM
Optional Application Tapes
Order Audit Trail System
Organic anion transporters
Original Article Tearsheet Service
Orthogonal Array Testing
osteochondral autograft transfer syste…
Over-the-Air Activation TeleService
Oxford Air Training School
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