- column balancing
- column binary
- column break
- column count
- column field
- column formula
- column function
- column label
- column number
- column printer
- column rank
- column separator
- column width
- columnar region
- COM1
- comaximal
- combination box
- combinational circuit
- combinational gate
- combinational mathematics
- combinatorial analysis
- combinatorial explosion
- combinatorial manifold
- combinatorial theory
- combinatorics
- combine
- combined alert
- combined file
- common fraction
- common model
- common object
- common segment
- common task
- common use
- communication software
- communication speed
- communication system
- communication task
- communication technology
- communication traffic
- communication type
- communication-oriented
- communications board
- communications chip
- communications computer
- communications control
- communications industry
- communications manager
- communications network
- communications parameters
- communications port
- communications processing
- communications server
- communications software
- communications toolbox
- communicator word
- community telephone
- commutability
- commutant
- commutation
- commutation circuit
- commutation relations
- commutative
- commutative algebra
- commutative field
- commutative law
- commutative matrix
- commutative operator
- commutative ring
- commutative scheme
- commutator
- commutator group
- commutator subgroup
- command syntax
- command word
- command-driven
- commandless
- comment
- comment line
- comment statement
- commercial
- commercial computing
- commercial statistics
- commit
- commit coordinator
- commitment coordinator
- common
- common action
- common bus
- common carrier
- common database
- common key
- common lisp
- common logarithm
- common measure
- common mode
- common network
- common program
- common ratio
- common software