-
An electronic device for storing and processing data, typically in binary form, according to instructions given to it in a variable program. -
A telegraph is a communication system that sends information by making and breaking an electrical connection. -
The telephone is the electrical system of communication that you use to talk directly to someone else in a different place. -
The transmission and reception of electromagnetic waves of radio frequency, especially those carrying sound messages. -
Is an electronic device used to receive sound and images which create television programs that people watch. -
A mobile phone is a wireless handheld device that allows users to make and receive calls. -
A flat slab of stone, clay, or wood, used especially for an inscription.