- chart recorder
- chaser
- checking line
- checkout
- channel capacitance
- channel command
- channel distribution
- channel efficiency
- channel grouping
- channel information
- channel number
- channel pointer
- channel program
- channel set
- channel stability
- character expression
- character phase
- character representation
- characteristic distortion
- charge conjugate
- charge particle
- charge-conjugation
- charging
- charging area
- chart record
- cheap call
- check card
- check digit
- chip complexity
- chip design
- chip layout
- chip rate
- cheese antenna
- chennelling
- chip area
- chip carrier
- chip fabricator
- Chireix antenna
- choke coil
- chopped mode
- chrominance signal
- circuit admittance
- circuit availability
- circuit capacitance
- circuit flow
- circuit group
- circuit subgroup
- circular rule
- circular scan
- circular velocity
- civil service
- civil time
- clarity
- classical MUF
- classical statistics
- clear signal
- clear traffic
- chocked nozzle
- choice box
- chopped signal
- chopper
- chopping
- chromatic semitone
- chromaticity coordinates
- chrominance amplifier
- chrominance channel
- circuit delay
- circuit element
- circuit integration
- circuit theory
- circular buffer
- circular polarization
- chroma detector
- chromatic aberration
- chromosphere
- cigar antenna
- cipher
- circuit noise
- circuit resonance
- circular point
- circular shift
- circular wave
- circulating decimal
- circulator
- cladding
- cladding diameter
- cladding mode
- class test
- clear air
- clear speech
- clear transmission
- cleardown
- clearing facilities
- clearing instruction
- clearing procedure
- clearing sequence
- clearing time
- click filter
- clarifying text
- classification statistics