Communications
Communications was a scientific field relating to the process of establishing a communications link between two or more parties. 

Communications, along with acoustics and electronics, was one of research engineer Doctor Sevrin's chosen fields, prior to his search for Eden. ()

A department aboard Federation starships was devoted to this field, from which, the communications officer maintained the ship's communications systems. (, et al.)

Signals 
 Communications frequency
 Radio-interference distress call
 SOS
 Smoke signal

Codes 
A list of codes:
 B'Zal
 Code 2
 Code 3
 Code 47
 Elgol-red
 Fractal encryption lock
 Recursive algorithm

Communication devices

Personal 
 Combadge
 Communications network
 Communicator
 Earpiece
 Holo-communicator
 Holofilter
 Laser beacon
 Subcutaneous transponder
 Universal translator

Long-range 
 Interplexing beacon
 Radio
 Subspace communications networks:
 Subspace relays:
 Subspace relay station
 Subspace relay antenna
 Subspace relay satellite
 Subspace transmitter

Display devices 
 Visual communication
 PADD
 Viewer
 Viewscreen
 Virtual sensory display

External links 
 

de:Kommunikation
nl:Communicatie
Communication
Academic disciplines