China
Africa
- Null model
- Null pointer
- Null results
- Nullator
- Nullor
- NumPy
- Numba
- Number density
- Number forms
- Number line
- Number needed to treat
- Number operator
- Number-theoretic transform
- Numeraire
- Numeral systems
- Numeric keypad
- Numerical analysis
- Numerical aperture
- Numerical continuation
- Numerical control
- Numerical differentiation
- Numerical diffusion
- Numerical dispersion
- Numerical error
- Numerical integration
- Numerical linear algebra
- Numerical method
- Numerical modeling
- Numerical relay
- Numerical stability
- Numerical weather prediction
- Nunataks
- Nurses
- Nursing
- Nusselt number
- Nut
- Nutation
- Nutraceuticals
- Nutrient agar
- Nutrient cycling
- Nutrient pollution
- Nutrients
- Nvidia Jetson
- Nvidia Tesla
- Nylon
- Nylon 12
- Nylon 6
- Nylon 66
- Nyquist
- Nyquist frequency
- Nyquist rate
- Nyquist stability criterion
- Nystagmus
- Nystatin
- O-Matrix
- O-acetyl-l-serine
- O-acetylserine
- O-cresol
- O-methyltransferase
- O-phthalaldehyde
- O-rings
- O-xylene
- OADM
- OAuth
- OBD
- OCL
- OCR
- OCR-A
- OCR-B
- OCSP
- OCT
- ODBC
- ODD
- ODE
- OEIS
- OEM
- OEW
- OFDM
- OFDMA
- OFET
- OGCM
- OLAP
- OLAP cube
- OLE
- OLE automation
- OLED
- OLET
- OLI
- OLR
- OLS
- OLT
- OMIM
- OMNeT++
- OMPL
- OMS
- OMT
- OMZ
- ONPG
- OODA loop
- OOK
- OOP
- OPC
- OPC Data Access
- OPC Unified Architecture
- OPGW
- OPLS
- OPM
- OPO
- OR gate
- ORAC
- ORB
- ORCA
- ORF
- ORM
- OROS
- OS-level virtualization
- OSB
- OSEM
- OSGP
- OSI model
- OSL
- OSP
- OSPF
- OSRM
- OSS
- OT
- OTA
- OTDR
- OTEC
- OTN
- OTP
- OTT
- OTU
- OTX2
- OWA
- OWL
- OX40
- OX40L
- Oak
- Oases
- Oasis effect
- Oat3
- Obducted
- Obduction
- Obesity
- Obesity epidemic
- Obesogens
- Obfuscated
- Obfuscation
- Object Linking and Embedding