Telecommunication is communication at a distance using electrical signals or electromagnetic waves. Examples of telecommunications systems are the telephone network, the radio broadcasting system, computer networks and the Internet. IUC Conference 2021June 28, 2021لماذا تطلق مايكروسوفت إصدارًا جديدًا من ويندوز؟June 26, 2021International Conference on Communications and Information Technology – IEEEJune 24, 2021