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n Nano
N Nitrogen
Na Sodium
NA Numerical aperture
NAA Neutron activation analysis
NADCAP National Aerospace and Defense Contractors Accreditation Procedures
NAND Logic term - Not-AND
nano 1.00E-9 (1/1,000,000,000; symbolized by the prefix n)
NASA National Aeronautics and Space Administration
Nb Niobium
NBE Near Band Edge
NBR Nitrile Butadiene-Acrylonitrile Rubber
NBS National Bureau of Standards
NC NanoCrystal; Numerical control
NCMS National Center for Manufacturing and Science
NCS Network Communication Standard
NCTA National Cable & Telecommunications Association
Nd Neodymium
ND New Donor; Native defect
NDA Nondisclosure agreement
NDE Nondestructive evaluation
NDIR Non-dispersive infrared spectroscopy
NDP Neutron depth profiling
NDT Nondestructive testing
NDUV Non-dispersive ultraviolet spectroscopy
Ne Neon
NEC National Electric Code
NECQ National Electronics Component Qualification System
NEMA National Electrical Manufacturers Association
NEP Noise Equivalent Power
NESHAP National emissions standards for hazardous air pollutants
NETD Noise Equivalent Temperature Difference
NewsML News Mark-up Language
NEXAFS Near Edge X-ray Absorption Fine Structure
NEXT Near End Crosstalk
NFE Near Free Electron
NFOM Near field optical microscopy
NFPA National Fire Protection Association
Ni Nickel
NIC Network Interface Card
NIH National Institutes of Health
NIST National Institute for Science and Technology
NITF News Industry Text Format
NIU Network Interface Unit
NLO Non-Linear Optic
NLOVS Niet Lineaire Optica Vaste Stoffen
NLR Non-Linear Refraction
nm Nanometer
NMOS Negative channel metal-oxide semiconductor
NMR Nuclear Magnetic Resonance; Normal mode rejection
NN Nearest Neighbor; Neural network
NNN Next Nearest Neighbor
No Nobelium
NOB Non-biased Optical Bistable (device)
NOCI Non Orthogonal Configuration Interaction
NOR Logic term - Not-OR
NOT Logic term - NOT
Np Neptunium
NPL Zero (No) Phonon Line
NPN Negative-positive-negative
NPT Non-Punch Through
NPV Net Present Value
NR Noise Reduction
NRA Nuclear Reaction Analysis
NRE Non-Recurring Engineering
NRZ Non-Return to Zero
NSA National Secutity Agency
NSE Neutral Stream Etch
NSF National Science Foundation
NTD Neutron Transmutation Doping
NTP Normal Temperature and Pressure
NTSC National Television System Committee
NTU Network Terminal Unit; Nephelometric Turbidity Units
NV Non-Volatile
NVM Non-Volatile Memory
NvOD Near Video On Demand
NVR Non-Volatile Residue
NVRAM Non-Volatile RAM
NXOR Logic term - Not-XOR

O

O Oxygen
OA Organic Acid
OAAF Open Advanced Authoring Format
OAC Optical Absorption Coefficient
OASIS Organization for the Advancement of Structured Information Standards
OBA Object Behavior Analysis
OBEM Object-Based Equipment Model
OBIC Optical Beam Induced Current
OBL Object-Based Language
OC Open Collector
OCAP OpenCable Application Platform
OCR Optical Character Recognition
OCSP Online Certificate Status Protocol
OD Outside Diameter
O-D Zero dimensional
ODBC Open DataBase Connectivity
ODEND OR Optical Detected ENDOR
ODEPR Optical Detected EPR
ODMII Optical Detected Microwave induced Impact Ionization
ODMR Optical Detected Magnetic Resonance
ODP Ozone Depletion Potential
ODR Oscillating Disk Rheometer
ODRL Open Digital Rights Language
ODS Ozone-Depleting Substances
OEBR Optical Edge Bead Removal
OEE Overall Equipment Effectiveness
OEIC OptoElectronic IC
OEM Original Equipment Manufacturer; Office of Emergency Management
OES Oti l E i i S t
OES Optical Emission Spectroscopy
OFDM Orthogonal Frequency Division Multiplexing
OFHC Oxygen-Free High-Conductivity Copper
OFS Open File System
OI Opto Isolator
OID Object Interaction Diagram; Object IDentification
OIL Ontology Interface Layer
OIM Orientational Imaging Microscopy
OL Overlay
OLB Outer Lead Bond
OLE Object Linking and Embedding
OLED Organic LED
OLS Ordinary Least Squares
OM Operational Modeling; Optical Microscopy; OrganoMetallic
OMA Object Management Architecture; Open Mobile Alliance
OMG Object Management Group
OMS Optical Mass Spectroscopy
OMT Object Modeling Technique
OMVPE Organometallic VPE
ONE Open Network Environment (Sun)
ONP Optical Nuclear Polarization
OO Object-Oriented
OOA Object-Oriented Analysis
OOD Object-Oriented Design
OODB Object-Oriented Data Base
OODBMS Object-Oriented Data Base Management System
OOP Object Oriented Programming
OOPS Object-Oriented Programming System
OpAmp Operational Amplifier
OPC Optical Particle Counter; Optical Proximity Correction
OPL Optically Pumped Laser
OPSE Optically Pumped Stimulated Emission
OPW Orthogonalized Plane Wave
OR Logic term - OR
ORB Object Request Broker
ORM Other Regulated Material
ORNL Oak Ridge National Laboratory
Os Osmium
OS Operating System
OSC Organic Solderability Coating
OSCI Online Services Computer Interface
OSD On Screen Display
OSDH Optical Shubnikhov-de Haas effect
OSF Open Systems Foundation
OSHA Occupational Safety Hazards Act
OSI Open System Interconnection
OSP Organic Solderability Preservative
OSRM Office of Standard Reference Materials
OSS Object Services Standard; Operation Support System
OSV Offset Scan Voting
OTP One Time Programmable
OTPROM One Time Programmable ROM
OVD Outside Vapor Deposition ( Corning )
OVL Overlay
OX OXide