- confocal cone
- confocal congruences
- confocal family
- confocal quadrics
- conformably separable
- conformance log
- confound
- commutator word
- comp
- compact group
- compact set
- compact space
- compacted fill
- compactify
- compaction
- compactness
- company network
- comparable elements
- comparator probe
- compare instruction
- comparison bridge
- comparison error
- comparison function
- comparison indicator
- compass azimuth
- compatibility box
- compatibility equation
- compensated regulator
- compensating filter
- compensation
- competing product
- compilable unit
- compilation routine
- compiled statement
- compiler error
- compiling duration
- complement base
- complement vector
- complementary characteristic
- complementary module
- complementary subspace
- complete carry
- complete field
- complete integrability
- complete operation
- complete representation
- complete table
- completed
- completed infinity
- completely orthogonal
- completely separable
- completion code
- complex domain
- complex fraction
- complex integer
- complex line
- complex multiplication
- complex plane
- complex potential
- complexification
- compliant
- component analysis
- component library
- component video
- composing letters
- composite algorithm
- composite component
- composite console
- composite display
- composite head
- composite matrix
- composite module
- composite number
- composite pulse
- composite relation
- compound circuits
- compound device
- compound distribution
- compound key
- compound matrices
- compound pendulum
- compressed file
- compressed video
- compression
- compression efficiency
- compression technology
- conicograph
- conics
- conjecture
- conjugate
- conjugate beam
- conjugate character
- conjugate classes
- conjugate conics
- conjugate diameters
- conjugate domains
- conjugate fields
- conjugate groups
- conjugate hyperboloid
- conjugate lines