- control accelerometer
- control emission
- control heading
- control range
- control response
- control string
- control track
- control transfer
- controlling clock
- controlling data
- controlling subsystem
- convergent nozzle
- convergent sequence
- conversation compiler
- conversion program
- conversion table
- convertible currency
- convex surface
- coordinate clock
- coordinate time
- coordination committee
- coordination contour
- coordination distance
- coplanar cassette
- copper cable
- copperweld wire
- copy check
- copy control
- copy cycle
- copy modification
- copy print
- copy separation
- copy speed
- cord switchboard
- continuous load
- continuous loading
- continuous loop
- continuous record
- contraction mapping
- contradirectional interface
- contributory unit
- control antenna
- control change
- control disk
- control logic
- control phase
- control request
- control specification
- control storage
- controlled bazard
- controlled reaction
- conventional letter
- conventional load
- conversation
- converter chip
- convolution method
- contractual service
- control module
- control performance
- control pulse
- control time
- control total
- conventional signal
- conversational mode
- convolution filter
- cooled maser
- coordinate graphics
- Cordless Standard 3
- core center
- core centre
- core configuration
- core diameter
- core hitch
- core image
- corner loss
- corner separator
- corona
- corporate feed
- corpuscular radiation
- correct key
- corrected range
- correcting circuit
- correction channel
- correction data
- corrective delay
- corrective measure
- correlation detection
- correlation diagram
- corrugated
- cosecant law
- cosmic noise
- cost increase
- Costas loop
- count pulse
- countdown
- coupled impedance
- coupler loss
- coupling distance
- coupling factor
- coupling loss