- confluence
- confocal conics
- confocal ellipsoids
- conformable
- conformably geodesic
- conformal transformation
- conformally separable
- conformant string
- conforming implementation
- congestion condition
- congestion control
- congestion state
- congruence
- congruence arithmetic
- congruence equation
- congruence field
- congruence group
- congruence relation
- congruence root
- congruent figures
- congruent number
- congruent numbers
- congruent transformation
- congruent triangles
- congruous formulas
- conic curve
- conic projection
- conic section
- conic surface
- conical
- conical flow
- conical loxodrome
- conical point
- conical projection
- conical ring
- conical scanning
- conical surface
- conical tube
- computability
- computed
- computer abuse
- computer allergy
- computer animation
- computer coordinator
- computer dependency
- computer dictionary
- computer file
- computer mind
- computer processed
- computer programmer
- computer project
- computer revolution
- computer science
- computer specialist
- computer terminal
- computer vendor
- computing
- computing element
- computing power
- concatenated code
- concatenation
- concatenator
- concave game
- concave programming
- concave surface
- concentric pencils
- concept symbol
- conceptional
- conceptual modeling
- conceptual-document
- concircularly flat
- concordance
- concordant sample
- concurrent maintenance
- concurrent programming
- condensation
- condition branch
- condition entry
- condition port
- condition transfer
- conditional branch
- conditional entropy
- conditional expectation
- conditional formatting
- conditional phrase
- conditional statement
- conditional sum
- conditionally convergent
- conditioning
- conduction state
- conductive plastic
- conference control
- configuration
- configuration control
- configuration file
- configuration programming
- configuration tables
- configure
- configured-out
- confluence analysis