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OS is an abbreviation for Ocean Surveillance
OS is an abbreviation for Oculus Sinister
OS is an abbreviation for Operating System
OS is an abbreviation for Ordinary Seaman
OS is an abbreviation for Out of Stock
OS is an abbreviation for Old Series
OS is an abbreviation for Old Style
Research OS
OSAP is an abbreviation for ORACLE Stress Analysis Program
Research OSAP
OSB is an abbreviation for Order of St Benedict
Research OSB
OSC is an abbreviation for Orbital Sciences Corporation
OSC is an abbreviation for Oscillator
Research OSC
OSCAR is an abbreviation for Orbiting Satellite Carrying Amateur Radio
OSCD is an abbreviation for Operations Support Computing Division
Research OSCD
OSCF is an abbreviation for Operations Support Computing Facility
Research OSCF
OSCRL is an abbreviation for Operating System Command Response Language
Research OSCRL
OSD is an abbreviation for Office of the Secretary of Defence
Research OSD
OSDIT is an abbreviation for Office of Software Development and Information Technology
Research OSDIT
OSE is an abbreviation for Operational Support Equipment
Research OSE
OSF is an abbreviation for Open Software Foundation
OSF is an abbreviation for Open Systems Foundation
OSF is an abbreviation for Order of St Francis
OSF is an abbreviation for Office of Space Flight
Research OSF
OSHA is an abbreviation for Occupational Safety and Health Administration
Research OSHA
OSI is an abbreviation for Office of Scientific Integrity
OSI is an abbreviation for Open Systems Interconnection
OSI is an abbreviation for Office of Special Investigations
Research OSI
OSI/RM is an abbreviation for Open Systems Interconnection/Reference Model
Research OSI/RM
OSIA is an abbreviation for On Site Inspection Agency
Research OSIA
OSID is an abbreviation for Operational System Interface Document
Research OSID
OSIS is an abbreviation for Ocean Surveillance Information System
Research OSIS
OSME is an abbreviation for Open Systems Message Exchange
Research OSME
OSO is an abbreviation for Offensive System Operator
OSO is an abbreviation for Orbiting Solar Observatory
Research OSO
OSP is an abbreviation for Optical Storage Processor
OSP is an abbreviation for Orbiting Standards Platform
Research OSP
OSPFIGP is an abbreviation for Open Shortest-Path First Internal Gateway Protocol
Research OSPFIGP
OSRD is an abbreviation for Office for Scientific Research and Development
Research OSRD
OSS is an abbreviation for Office Support System
OSS is an abbreviation for Office of Strategic Services
OSS is an abbreviation for Operation Support System
OSS is an abbreviation for Office of Space Sciences
OSS is an abbreviation for Orbital Stabilization System
Research OSS
OSSA is an abbreviation for Office of Space Science and Applications
Research OSSA
OSSE is an abbreviation for Oriented Scintillation Spectrometer Experiment
Research OSSE
OST is an abbreviation for Office of Science and Technology
Research OST
OSTA is an abbreviation for Office of Space and Terrestrial Applications
Research OSTA
OSTDS is an abbreviation for Office of Space Tracking and Data Systems
Research OSTDS
OSTF is an abbreviation for Operational System Test Facility
Research OSTF
OSTP is an abbreviation for Office of Science and Technology Policy
Research OSTP
OT is an abbreviation for Old Testament
OT is an abbreviation for Overtime
OT is an abbreviation for Occupational Therapy
OT is an abbreviation for Offensive Threat
OT is an abbreviation for Operational Testing
Research OT
OT & E is an abbreviation for Operational Test and Evaluation
Research OT & E
OT & LF is an abbreviation for Open Taxi & Limousine Foundation
Research OT & LF
OTA is an abbreviation for Office of Technical Assistance
OTA is an abbreviation for Office of Technology Assessment
OTA is an abbreviation for Optical Telescope Assembly
Research OTA
OTB is an abbreviation for Off-Track Betting
Research OTB
OTC is an abbreviation for Over The Counter
Research OTC
OTDA is an abbreviation for Office of Tracking and Data Acquisition
Research OTDA
OTDR is an abbreviation for Optical Time Domain Reflectometer
Research OTDR
OTEC is an abbreviation for Ocean Thermal Energy Conversion
Research OTEC
OTEF is an abbreviation for Operational Test and Evaluation Facility
Research OTEF
OTF is an abbreviation for Open Token Foundation
Research OTF
OTH is an abbreviation for Over the Horizon
Research OTH
OTH-B is an abbreviation for Over The Horizon - Backscatter
Research OTH-B
OTH-R is an abbreviation for Over the Horizon Radar
Research OTH-R
OTH-T is an abbreviation for Over the Horizon-Targeting
Research OTH-T
OTHB is an abbreviation for Over the Horizon Backscatter
Research OTHB
OTHR is an abbreviation for Over The Horizon Radar
Research OTHR
OTIIA is an abbreviation for Operational Test IIA
Research OTIIA
OTP is an abbreviation for Operations Test Plan
Research OTP
OTPS is an abbreviation for Operation Test Program Sets
Research OTPS
OTR is an abbreviation for On The Rag
Research OTR
OTRAG is an abbreviation for Orbital Transport und Raketen Aktiengesellschaft
Research OTRAG
OTS is an abbreviation for Oakhanger Tracking Station
OTS is an abbreviation for Orbital Test Satellite
OTS is an abbreviation for Officers' Training School
Research OTS
OTSR is an abbreviation for Optics Technology for Stand-Off Reconnaissance
Research OTSR
OTV is an abbreviation for Orbital Transfer Vehicle
Research OTV
OUSDRE is an abbreviation for Office of the Under Secretary of Defence for Research and Engineering
Research OUSDRE
OUTBD is an abbreviation for Outboard
Research OUTBD
OUTWATS is an abbreviation for Outward Wide Area Telephone Service
Research OUTWATS
OV is an abbreviation for Orbital Vehicle
OV is an abbreviation for Orbiter Vehicle
OV is an abbreviation for Orbiting Vehicle
Research OV
OW is an abbreviation for One Way
Research OW
OWDC is an abbreviation for Office of Water Data Coordination
Research OWDC
OWL is an abbreviation for One Watt Linear
Research OWL
OWL/D is an abbreviation for Optical Warning and Location Designator
Research OWL/D
OWRM is an abbreviation for Office of Weather Research and Modification
Research OWRM
OWS is an abbreviation for Orbital Workshop
Research OWS
OX is an abbreviation for Oxidizer
Research OX
OYSTER is an abbreviation for Optical Yardsticks Toward Error Reduction
Research OYSTER
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