NASA Acronyms

Alphabetical Listing of NASA Acronyms

• OP — Operation
• OP — Oxygen Purge
• OPA — Operations Planning Analysis
• OPB — Oxidizer Preburner
• OPBOV — Oxidizer Preburner Oxidizer Valve
• OPDAR — OPtical Detection And Ranging
• OPE — Other Project Element
• OPER — Operations
• OPER — Operation
• OPF — Orbiter Processing Facility
• OPF — Orbiter Processing Facility
• OPFC — Orbiter Preflight Checklist
• OPGUID — OPtimum Guidance (Technique)
• OPI — Orbiter Payload Interrogator
• OPIDF — Operational Planning Identification File
• OPIS — Orbiter Prime Item Specification
• OPL — Open Problem List
• OPL — Operational
• OPLF — Orbiter Processing And Landing Facility
• OPNS — Operational Phase
• OPO — Orbiter Project(s) Office
• OPOV — Oxidizer Preburner Oxidizer Valve
• OPOV — Oxidizer Preburner Oxidizer Valve
• OPP — Opportunity
• OPP — OPPosite
• OPPAR — Orbiter Project(s) Parts Authorization Request
• OPPL — Orbiter Project Parts List
• OPR — Office Of Primary Responsibility
• OPR — Operations Planning Review
• OPR — Operator
• OPR — Orbiter/Payload Recorder
• OPR — Oxygen Pressure Regulator
• OPRV — Oxygen Pressure Relief Valve
• OPS — Operational Sequence
• OPS — Operations
• OPS — Operations Sequence
• OPS — Orbiter Project Schedules
• OPS — Oxygen Purge System
• OPSB — Orbiter Processing SuPport Building
• OPSR — Operations Supervisor (GSTDN Site)
• OPSS — Orbital Propellant Storage Subsystem
• OPT — OPerational Pressure Transducer
• OPT — Optics
• OPT — Optimum
• OPT — Option
• OPTB — Operational Program Time Base
• OPTB — Opposite
• OR — OPerational Right
• OR — Operations Requirement
• OR — Operations Review
• OR — Operations Room
• OR — Outer Roll
• OR — Oxygen Relief
• ORB — Orbit
• ORB — Order
• ORB — 1 -g Orbiter One-g (trainer)
• ORCHIS — Oak Ridge Computerized Hierarchical Information
• ORCHIS — System
• ORD — Operational Readiness Date
• ORD — Operational Ready Data
• ORD — Operational Requirements Document
• ORD — Orbital Requirements Document
• ORD — Ordnance
• ORDC — Orbiter Data Reduction Center
• ORE — On-Orbit Repair Experiment
• ORF — Orifice
• ORG — Organization
• ORI — Operational Readiness Inspection
• ORIDE — Override
• ORIEN — Orientation
• ORIG — Origin
• ORLA — OPtimum Repair Level Analysis
• ORP — OFS Retransmission Processor
• ORR — Operational Readiness Review
• ORR — Operations Requirements Review
• ORS — Orroval Valley
• ORS — Orbital Refueling System
• ORSDI — Oak Ridge Selective Dissemination Of Information
• ORT — Operational Readiness Test
• ORT — Orbit Readiness Test
• ORTHOG — Orthogonal
• OS — On-Orbit Station
• OS — Operating Software
• OS — Operating System
• OS — OPtics Subsystem
• OS — Orbiter CEI Specification
• OSA — Operational Support Area
• OSC — Oscillator
• OSDH — Orbiter System Definition Handbook
• OSE — Operating SupPort Equipment
• OSE — Orbiter Support Equipment
• OSF — Office Of Space Flight (now OSTS)
• OSF — Ordnance Storage Facility
• OSHA — Occupational Safety And Health Act (Activity)
• OSHA — Occupational Safety And Health Administration
• OSLM — Operations ShOP/Lab Manager
• OSM — Orbital Service Module
• OSMP — Operational SuPport Maintenance Plan
• OSO — Ocean SYstems Operation
• OSOP — Orbiter Systems Operating Procedures