- conference coefficient
- confetti
- configuration member
- confirmation signal
- congested band
- conic angle
- conical antenna
- conical diaphragm
- conical scan
- computer channel
- concurrent maintenance
- condition mask
- conditional transfer
- conducting line
- cone antenna
- conference call
- configuration design
- compact code
- compact form
- compander
- companion chip
- compensation claim
- compiling technique
- complementary dipole
- complementary outputs
- complete failure
- completion code
- complex coupling
- component colour
- component generator
- component signals
- composite signal
- compressible plasma
- conjugate operator
- connected signal
- connecting delay
- connecting row
- connecting stage
- connection number
- connection strip
- consecutive computer
- consecutive dataset
- consecutive operation
- consecutive processing
- conservation system
- computer memory
- computer network
- computerization
- computing mechanism
- conductive body
- conductor coiling
- cone
- conference bridges
- confravision
- constant acceleration
- constant availability
- constant component
- constant lithography
- constraint class
- consultant
- consumables store
- contact making
- contact noise
- contact port
- contamination
- contention delay
- contiguous band
- contingent mission
- continuous beam
- continuous casting
- continuous counter
- consultation call
- contact input
- contact masking
- content function
- continental drift
- contingencies
- contingency procedure
- continuation page
- continuity pilot
- Continuity Signal
- continuous curve
- continuum emission
- contracted notation
- control byte
- control card
- control directory
- control process
- control vector
- conversational computer
- converter cabinet
- convolution filtering
- continuous emission
- continuous feed
- continuous fibre
- continuous line
- continuous service
- continuous spectrum
- continuous vulcanization
- continuum bands