O	OC
O	OH—O—CHR—C
O	OP
O	OR,—OC
O	OS
O	Orange
O	Orbitale
O	Other
O	O—C
O	O—P
O	opened
O	operator
O	orientations
O	origin
O	osmium
O	oxygen
OA	OR-AND
OA	oleanolic acid
OA	orientation angle
OA	oxidized alginate
OAD	Operation Accuracy department
OAD	Oxalic acid dihydrate
OAD	online action detection
OAI	OR-AND-Invert
OAI	Or-And inverter
OAM	Orbital Angular Momentum
OAN	oil absorption number
OAN	oil adsorption number
OAO	Operation Accuracy Officer
OAS	Organic Acid Solution
OASIS	Open Artwork System Interchange Standard
OAT	outside air temperatures
OB	Oustside Broadcast
OB	optical black
OBA	object-based audio
OBC	olefin block copolymer
OBC	olefin block copolymers
OBCOD	Other Biodegradable Chemical Oxygen Demand
OBD	On-Board Diagnostics
OBD	On-Board-Diagnostics
OBD	On-board Diagnostic
OBD	on-board diagnostics
OBD	optical beam deflection
OBE	on-board electronics
OBE	on-board equipment
OBMC	Overlapped Block Motion Compensation
OBO	output back-off
OBOC	one-bead-one-compound
OBSAI	Open Base Station Architecture Initiative
OBSS	overlap basic service set
OBSS	overlapping basic service set
OBU	On Board Unit
OBU	on-board unit
OC	Offset Contribution
OC	Oxidized cellulose
OC	offset cancel
OC	orthogonal cover
OC	ovarian cancer
OCA	Optical Clear Adhesive
OCA	Optically clear adhesive
OCA	optical clear adhesive
OCA	optically clear adhesive
OCAML	Objective Categorial Abstract Machine Language
OCB	Optically Compensatory Bend
OCB	occupied channel bandwidth
OCB	optical compensated birefringence
OCB	optically compensated birefringence
OCC	Orthogonal Cover Code
OCC	orthogonal covering code
OCCF	on-chip color filter
OCCI	Open Cloud Computing Interface
OCD	Obsessive Compulsive Disorder
OCD	Off Chip Driver
OCD	obsessive compulsive disorder
OCD	obsessive-compulsive disorder
OCD	over current detection
OCDR	optical coherence domain reflectometry
OCE	oleandrin-containing extract
OCE	optimized connectivity experience
OCF	Open Cell Foams
OCF	Open Connectivity Foundation
OCF	Open Connectivity Foundation™
OCF	open-celled foam
OCI	Open Container Initiative
OCI	Oracle Cloud Infrastructure
OCI	open chromatin index
OCL	on-chip lens
OCP	Open Compute Project
OCPD	obsessive-compulsive personality disorder
OCR	Optical Character Recognition
OCR	Optical Charter Recognition
OCR	Optical character recognition
OCR	Optimal Character Recognition
OCR	Oxygen Consumption Rate
OCR	oil circulation ratio
OCR	optical character reader
OCR	optical character recognition
OCR	optical clear resin
OCR	optically clear resin
OCR	overall condition rating
OCR	oxygen consumption rate
OCR	oxygen consumption rates
OCS	Online Charging System
OCS	open chromatin sites
OCSP	Online Certificate Status Protocol
OCSVM	one class support vector machine
OCT	Occipital-Cervical-Thoracic
OCT	Optical Coherence Tomography
OCT	Optimal Cutting Temperature
OCT	optical coherence tomography
OCT	optimal cutting temperature
OCTA	optical coherence tomography angiography
OCU	Osaka City University
OCV	Open Circuit Voltage
OCV	on-chip variation
OCV	open circuit voltage
OCV	open-circuit voltage
OD	Olfactory dysfunction
OD	Optical Density
OD	Optical Dimeter
OD	Optical density
OD	o-dianisidine
OD	oil dispersion
OD	oil dispersions
OD	optical density
OD	optical distance
OD	outer diameter
OD	outside diameter
OD	oxide diffusion
ODD	operational design domain
ODD	optical disc drive
ODDF	orally disintegrating dosage form
ODE	ordinary differential equation
ODIN	open device identification number
ODM	Original Design Manufacturer
ODMR	optically detected magnetic resonance
ODP	Open Data Plane
ODP	Ozone Depletion Potential
ODR	on-demand reading
ODS	operational data store
ODT	On-Die Termination
ODW	organic dry weight
OE	outer end
OEC	Open Edge Compute
OEE	Overall Equipment Effectiveness
OEG	oligo ethylene glycol
OEI	one engine inoperative
OELD	organic electro-luminescence display
OEM	Original Equipment Manufacturer
OEM	Original Equipment Manufacturing
OEM	original equipment manufacturer
OEM	original equipment manufacturers
OEM	original equipment manufactures
OER	Oxygen Evolution Reaction
OER	oxygen evolution reactions
OES	optical emission spectrometry
OES	optical emission spectroscopy
OETF	Optical Electronic Transfer Function
OETF	optical-electro transfer function
OF	Open Field
OF	Optical Flow
OFAC	of Foreign Assets Control
OFDM	Orthogonal Frequency Division Multiplex
OFDM	Orthogonal Frequency Division Multiplexing
OFDM	Orthogonal Frequency-Division Multiplexing
OFDM	Orthogonal frequency division multiplexing
OFDM	Orthogonal frequency-division multiplexing
OFDM	orthogonal frequency division multiplexing
OFDM	orthogonal frequency divisional multiplexing
OFDM	orthogonal frequency domain multiplexing
OFDM	orthogonal frequency-division multiplexing
OFDMA	Orthogonal Frequency Divided Multiple Access
OFDMA	Orthogonal Frequency Division Multi Access
OFDMA	Orthogonal Frequency Division Multiple Access
OFDMA	Orthogonal Frequency-Division Multiple Access
OFDMA	orthogonal frequency division multiple access
OFDMA	orthogonal frequency division multiplex access
OFDMA	orthogonal frequency-division multiple access
OFDR	Optical Frequency Domain Reflectometry
OFE	Optical Flow Estimate
OFET	organic field effect transistor
OFI	optical fiber interferometers
OFM	output feature map
OFP	Operational Flight Program
OFP	orange fluorescent protein
OFR	Optical Fiber Refractometers
OFS	Of Full Scale
OFS	Olfactory function score
OGD	oxygen glucose deprivation
OGTT	Oral Glucose Tolerance Test
OGV	outlet guide vane
OH	of hydroxide
OH	of hydroxyl
OHC	outer hair cell
OHMD	optical head-mounted display
OHQ	Orthostatic Hypotension Questionnaire
OHS	Obesity Hyperventilation Syndrome
OHT	overhead hoist transport
OHV	off-highway vehicles
OI	Object Identification
OI	operational intelligence
OIF	Optical Internetworking Forum
OIR	oxygen-induced retinopathy
OIS	Overnight Index Swap
OIS	optical image stabilization
OIS	optical image stabilizer
OIT	Oxidative Induction Time
OIV	Occupant Impact Velocity
OJDK	Open Java Development Kit
OK	Open Kernel
OL	organic layer
OLA	oligonucleotide ligation assay
OLAP	on-line analytical processing
OLB	outer lead bonding
OLC	Occupant Load Criterion
OLCD	Orthogonal Liquid Crystal Displays
OLE	oscillatory lung expansion
OLED	ORGANIC LIGHT EMITTING DIODE
OLED	Organic Light Emitting Diodes
OLED	Organic Light Emitting Display
OLED	Organic Light-Emitting Diode
OLED	Organic light emitting diode
OLED	Organic light emitting display
OLED	Organic light-emitting diode
OLED	Organic light-emitting diodes
OLED	organic light emitting device
OLED	organic light emitting devices
OLED	organic light emitting diode
OLED	organic light emitting diodes
OLED	organic light emitting display
OLED	organic light-emitting device
OLED	organic light-emitting diode
OLED	organic light-emitting diodes
OLED	organic light-emitting display
OLET	organic light-emitting transistor
OLOS	optical loss of signal
OLR	organic loading rate
OLS	Optical Line System
OLS	ordinary least square
OLS	ordinary least squares
OLSR	Optimized Link State Routing
OLSR	Ordinary Least Squares Regression
OLT	Optical Line Terminal
OLT	optical line termination
OLT	orthotopic liver transplantation
OLTC	on-load tap changer
OM	Otitis Media
OM	operating mode
OM	optical microscope
OM	optical microscopy
OM	osteogenic medium
OMA	Open Mobile Alliance
OMA	Optical Modulation Amplitude
OMA	Orthogonal Multiple Access
OMAP	Open Media Application Platform
OMAP	Open Multimedia Applications Platform
OMAS	Optical Media Advanced Sensor
OMG	Oligodendrocyte Myelin Glycoprotein
OMM	outer mitochondrial membrane
OMN	operating mode notification
OMN	output matching network
OMRI	Organic Materials Review Institute
OMS	Order Management System
OMS	order management subsystem
OMS	outage management system
OMTP	open mobile terminal platform
ON	OTX2-NEUROD1
ON	optic neuritis
ONAP	Open Network Automation Platform
OND	Other Neurologic Disease
ONF	Open Networking Foundation
ONFI	Open NAND Flash Interface
ONG	OTX2-NEUROD1-GON4L
ONL	outer nuclear layer
ONO	Oxide-Nitride-Oxide
ONS	oral nutritional supplement
ONT	optical network terminal
ONU	optical network unit
OOB	out-of-band
OOK	On-Off Keying
OOM	out of memory
OOO	out-of-order
OOP	Object oriented programming
OOP	object-oriented programming
OOS	OUT-OF-SYNCH
OOS	out-of-sync
OOT	out-ot-time
OOTF	Optical Optical Transfer Function
OOTF	opto-optical transfer function
OP	operation points
OP	operational point
OP	organizing pneumonia
OPA	Omni-Path Architecture
OPA	Omni-Path™ Architecture
OPA	Open Policy Agent
OPC	Optical Proximity Correction
OPC	Oracle Public Cloud
OPC	Ordinary Portland Cement
OPC	occlusal plane cant
OPC	open platform communications
OPC	optical proximity connection
OPC	ordinary Portland cement
OPC	overspeed protection control
OPE	optic path entrainer
OPE	order-preserving encryption
OPESG	optic path entrainer signal generator
OPF	oxidized polyacrylonitrile fiber
OPFE	optical path folding element
OPL	organic planarization layer
OPL	organic planarization layers
OPL	outer plexiform layer
OPM	OPTICALLY-PUMPED MAGNETOMETER
OPM	Optically Pumped Magnetometer
OPO	Optical Parametric Oscillator
OPP	Optimum Postural Positions
OPP	on-premise processor
OPP	optimal postural positions
OPR	Order Protection Rule
OPS	order provisioning subsystem
OPSL	optically pumped semiconductor laser
OPW	overlapping process window
OQA	outgoing quality assurance
OR	Object Recognition
OR	Offset Ratio
OR	Onion routing
OR	Other Rejection
OR	Overhead Reserve
OR	odds ratio
OR	odds ratios
OR	of-range
OR	operating room
OR	overall response
ORAC	Oxygen Radical Absorbance Capacity
ORB	Order-Ready Board
ORC	Organic Rankin Cycle
ORC	Organic Rankine Cycle
ORC	Oxidized Regenerated cellulose
ORF	Open Reading Frame
ORF	open-reading frame
ORGAN	objective-reinforced generative adversarial network
ORI	Open Radio Interface
ORNL	Oak Ridge National Laboratory
ORP	Oncology Research Professional
ORP	Oxidation Reduction Potential
ORP	Oxidation-Reduction Potential
ORP	Oxygen-Reduction Potential
ORP	oxygen reduction potential
ORR	Objective Response Rate
ORR	Overall response rate
ORR	objective response rate
ORR	optimal route reflection
ORR	overall response rate
ORR	oxygen reduction reactions
ORT	Oral Rescue Therapy
OS	OFDM symbol
OS	OFDM symbols
OS	OPERATION SYSTEM
OS	Occlusion sensitivity
OS	Operating System
OS	Operation System
OS	Ordered Set
OS	Overall Survival
OS	Oxidative Stress
OS	operating system
OS	operating systems
OS	operation system
OS	outer segment
OS	overall survival
OS	oxychlorosene sodium
OSA	Obstructive Sleep Apnea
OSA	Octane sulphonic acid
OSA	Octenyl succinic anhydride
OSA	Open Spectrum Access
OSA	optical spectrum analyzer
OSAS	Obstructive Sleep Apnea Syndrome
OSB	Oriented Strand Board
OSC	Open Sound Control
OSC	ordered-subset convex
OSC	organic solar cell
OSC	orthogonal signal correction
OSC	oxygen storage component
OSCC	oral squamous cell carcinoma
OSD	On Screen Display
OSD	Operation Space Domain
OSD	on-screen display
OSDI	Ocular Surface Disease Index
OSDR	on-screen display reader
OSE	Operating System Embedded
OSFET	oxide semiconductor field effect transistor
OSG	organo silicate glass
OSI	Open System Interconnect
OSI	Open System Interconnection
OSI	Open Systems Interaction
OSI	Open Systems Interconnect
OSI	Open Systems Interconnection
OSI	Other System Information
OSI	open system interconnection
OSI	other system information
OSM	Ovine submaxillary mucin
OSM	Oxygen storage material
OSP	Organic Solderability Preservative
OSP	optical state profile
OSPF	OSPF—Open Shortest Path First
OSPF	Open Shortest Past First
OSPF	Open Shortest Path First
OSS	Operation Support System
OSS	Operations Support System
OSS	Optical shape sensing
OSS	object storage service
OSS	open source software
OSS	operational supporting system
OSS	original silicon surface
OST	Overlap Shear Testing
OST	one side tacky
OSU	Ohio State University
OSV	operating system vendor
OT	Open Transactions
OT	Open Transition
OT	operating temperatures
OT	operational technology
OT	operational transformation
OT	outboard tab
OT	over-temperature
OTA	Online Travel Agents
OTA	Online travel agent
OTA	Over The Air
OTA	Over-The-Air
OTA	operational transconductance amplifier
OTA	over-the-air
OTC	one-time code
OTC	over-the-counter
OTD	On-Time Delivery
OTDOA	Observed Time Difference Of Arrival
OTDR	Optical Time Domain Reflectometry
OTDR	Optical time domain reflectometer
OTDR	optical time domain reflectometry
OTDR	optical time-domain reflectometry
OTEC	Ocean Thermal Energy Conversion
OTF	oral thin film
OTF	out-the-front
OTFT	organic thin film transistor
OTN	Optical Transport Network
OTP	ONE TIME PROGRAMMABLE
OTP	One Time Programable
OTP	One Time Programmable
OTP	One-Time Password
OTP	One-time programmable
OTP	one-time PIN
OTP	one-time password
OTP	one-time passwords
OTP	one-time programmable
OTPA	Operational Transfer Path Analysis
OTPNVM	one time programmable non-volatile memory
OTR	Oxygen Transmission Rate
OTR	oxygen transmission rates
OTS	Organelle Targeting Sequence
OTS	ovonic threshold switch
OTS	ovonic threshold switching
OTT	Over The Top
OTT	Over-The-Top
OTU	operational taxonomic units
OTW	over-the-wire
OU	organizational unit
OU	output unit
OUD	Opioid use disorders
OUD	Organic Unit Designation
OUI	Organizationally Unique Identifier
OUI	organic user interfaces
OUR	oxygen uptake rate
OV	Occlusion Visibility
OV	optimum value
OV	over-voltage
OVA	Open Virtual Appliance
OVA	open virtualization appliance
OVD	occupancy video data
OVI	Optically Variable Ink
OVJP	Organic vapor jet printing
OVPD	organic vapor phase deposition
OVS	OSHA Versatile Sampler
OVS	Open Virtual Switch
OWA	Open World Assumption
OWA	Outlook® Web Access
OWASP	Open Web Application Security Project
OWC	Optical Wireless Communication
OWC	oscillating water column
OWD	One Way Delay
OWS	Occupancy Warning Systems
OWS	optimal write size