China 
Africa 
- Computer memory
- Computer module
- Computer mouse
- Computer networks
- Computer performance
- Computer program
- Computer programming
- Computer science
- Computer scientists
- Computer security
- Computer simulation
- Computer viruses
- Computer vision
- Computer vision syndrome
- Computer-aided process planning
- Computer-animated
- Computer-assisted orthopedic surgery
- Computer-assisted surgery
- Computer-automated design
- Computer-generated holography
- Computer-mediated communication
- Computer-mediated reality
- Computing
- Computing platform
- Conalbumin
- Concanavalin A
- Concatemers
- Concatenation
- Concave
- Concave functions
- Concave polygon
- Concentrate
- Concentrated solar still
- Concentration
- Concentration cell
- Concentration gradient
- Concentration of measure
- Concentration parameter
- Concentration polarization
- Concentration ratio
- Concentrator photovoltaics
- Concentrators
- Concentric hypertrophy
- Concept drift
- Concept maps
- Concept of operations
- Concept testing
- Conceptual clustering
- Conceptual design
- Conceptual framework
- Conceptual graphs
- Conceptual model
- Conceptual schema
- Conceptualization
- Concern
- Concerted
- Concerted reactions
- Concha bullosa
- Conchiolin
- Concordances
- Concrete
- Concrete blocks
- Concrete cancer
- Concrete cone failure
- Concrete cover
- Concrete degradation
- Concrete mixers
- Concrete pavement restoration
- Concrete plant
- Concrete pump
- Concrete recycling
- Concrete shell
- Concrete slabs
- Concrete slump test
- Concretions
- Concurrency
- Concurrency control
- Concurrent
- Concurrent computing
- Concussions
- Conda
- Condensate
- Condensate polisher
- Condensate pump
- Condensation
- Condensation algorithm
- Condensation domain
- Condensation particle counter
- Condensation reaction
- Condensed matter physics
- Condensed tannins
- Condenser
- Condensing boilers
- Condition monitoring
- Condition number
- Conditional
- Conditional distribution
- Conditional entropy
- Conditional expectation
- Conditional independence
- Conditional logistic regression
- Conditional mutual information
- Conditional probability
- Conditional probability distribution
- Conditional probability table
- Conditional random field
- Conditional variance
- Conditionally convergent
- Conditionally independent
- Conditioner
- Conditioning
- Conductance
- Conducted emissions
- Conduction
- Conductive agent
- Conductive charging
- Conductive elastomers
- Conductive hearing loss
- Conductive ink
- Conductive polymers
- Conductive textile
- Conductivity
- Conductometry
- Conductor
- Condyle
- Cone angle
- Cone calorimeter
- Cone cells
- Cone clutches
- Cone condition
- Cone of depression
- Cone tracing
- Cones
- Conference on Computer Vision and Pattern Recognition
- Confidence band
- Confidence interval
- Confidence region
- Confidentiality
- Configuration
- Configuration design
- Configuration entropy
- Configuration files
- Configuration items
- Configuration management
- Configuration space
- Configurator
- Confined liquid
- Confinement
- Confirmation bias
- Confirmatory factor analysis