Architecture Abbreviations and Acronyms
- OPER RESOperations Research
- OPGOpening
- OPNGOpening
- OPPOpposite
- OPQOpaque
- OPSDOntario Provincial Standard Drawing
- OPSOOverpressure Shutoff
- OPSSOntario Provincial Standard Specification
- OPSVOverpressure Safety Valve
- OPTBOpposite
- OPVOverpressure Valve
- OROperations Research
- ORoutside radius
- ORBObject Request Broker
- ORBObject Request Brokers
- ORBSObject Request Brokmrs
- ORCOpen Research Compiler
- ORCHISSystem
- ORLIOperation Resilient Long Island
- ORPOperational Readiness Platform
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