dc (direct-current) ringer
dc (direct-current) ringing
dc (direct-current) selection
dc (direct-current) signaling
dc (direct-current) telegraphy = direct current telegraphy
dc (direct-current) transformer
dc (direct-current) transmission
dc (direct-current) tube neon lamp
dc (direct-current) voltage
DC1-4 (Device Control 1-4)
DCE (Data Circuit-terminating Equipment)
DCE (Data Communication Equipment)
DCE (Distributed Computing Environment)
DCF
DCM (Disk Cache Memory)
DCTL (direct-coupled transistor logic) gate
dd
DD (double density) disk
ddd
DDDS (double density double sided) disk
dde
ddt
d.d.t.
ddvp
De-Broglie wave
de facto
de facto standard
de-ice
de-icer
de jure