Telecommunications

Telecommunication, often used in its plural form or abbreviated as telecom, is the transmission of information over a distance using electrical or electronic means, typically through cables, radio waves, or other communication technologies. These means of transmission may be divided into communication channels for multiplexing, allowing for a single medium to transmit several concurrent communication sessions. Long-distance technologies invented during the 20th and 21st centuries generally use electric power, and include the electrical telegraph, telephone, television, and radio.

Extends: [Economics of transport and utility industries](https://wikipedia.org.ai/Economics of transport and utility industries), [Mass media technology](https://wikipedia.org.ai/Mass media technology), Telecommunications