Acronyms: O

Acronym	Name
OPAS	Overhead panel ARINC 629 system
OPASI	Observation of Potential Adverse Safety Impact
OPBC	Overhead panel bus controller
OPD	Optimized Profile Descent
OPD	Optimum Profile Descent
OPI	Office of Primary Interest
OPLT	Operational Acceptable Level of Traffic
OPR	Office of Primary Responsibility
OPS	AF Operations
OPS	OPS per second
OPS	Operations
OPSNET	Operations Network
OPSPECS	OPS specifications
OPSW	Operational Switch
OPU	Overspeed protection unit
OPV	Optionally piloted vehicle
OPX	Off Premises Exchange
OR	Operational requirements
ORB	Object request broker
ORD	Chicago O'Hare International Airport
ORD	Operational Readiness Demonstration
ORD	Operational Readiness Demonstration - Milestone
ORD	Operational requirements document
ORD	Operations readiness demonstration
ORS	Obstruction Repository System
OS	Open service
OS	Operating system
OS	Operational Shakedown & Cutover
OSA	Operational safety assessment
OSCAR	Orbiting Satellite Carrying Amateur Radio
OSD	Office of the Secretary of Defense (U.S.)
OSD	Operational Suitability Demonstration
OSDS	Oceanic System Development and Support
OSDS	Oceanic systems development support
OSE	Open systems environment
OSED	Operational service and environment definition
OSEIC	Operational service and environment information capture
OSGCS	One system ground control station
OSHA	Occupational Safety and Health Administration
OSI	Open systems interface/interconnection
OSI-RM	OSI-reference model
OSI/M	Organizational Success Increase (OSI)/Organizational Success Measure (OSM)
OSIE	OSI environment
OSIP	Office Safety Inspection Program
OSJTF	Open Systems Joint Task Force (U.S.)
OSPF	Open shortest path first
OSPGCS	One system portable ground control station (U.S. Army)
OSR	Order status report
OSRVT	One System Remote Video Terminal
OSRWG	Oceanic Separation Reduction Working Group
OST	Office of the Secretary of Transportation
OT&E	Operational test and evaluation
OTA	Office of Technology Assessment (U.S.)
OTA	Other transaction agreement
OTFO	Operations Technical Field Office
OTFP	Operational traffic flow planning
OTH	Over the horizon
OTM-4D	Oceanic Trajectory Management-4D
OTP	Office of Telecommunications Policy (U.S.)
OTPS	Oceanic Traffic Planning System
OTR	Oceanic Transition Route
OTS	Off the shelf
OTS	Organized Track System
OTS	Out of Service
OVHT	Overheat

AeroBook

Acronyms: O