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Computer
English mathematician and inventor Charles Babbage is credited with having conceived the first automatic digital computer.
A computer is a machine that can be instructed to carry out sequences of arithmetic or logical operations automatically via computer programming. Modern computers have the ability to follow generalized sets of operations, called programs. These programs enable computers to perform an extremely wide range of tasks -
Telegraph
Developed in the 1830s and 1840s by Samuel Morse (1791-1872) and other inventors, the telegraph revolutionized long-distance communication. It worked by transmitting electrical signals over a wire laid between stations. -
Telephone
The invention of the telephone was the culmination of work done by many individuals and led to an array of lawsuits relating to the patent claims of several individuals and numerous companies.
The concept of the telephone dates back to the string telephone or lover's telephone that has been known for centuries, comprising two diaphragms connected by a taut string or wire. Sound waves are carried as mechanical vibrations along the string or wire from one diaphragm to the other. -
Radio
The radio was created by Guillermo Marconi, William Dubilier and Reginald Fessenden.
Radio is the technology of signalling and communicating using radio waves.[1][2][3] Radio waves are electromagnetic waves of frequency between 30 hertz (Hz) and 300 gigahertz (GHz). They are generated by an electronic device called a transmitter connected to an antenna which radiates the waves, and received by a radio receiver connected to another antenna. -
Television
Television (TV), is a telecommunication medium used for transmitting moving images in monochrome (black and white), or in colour, and in two or three dimensions and sound, the credit to who invented the television belongs to Scottish engineer John Logie Baird. He built and demonstrated the world’s first mechanical television. -
Mobile Phone
The first handheld cellular mobile phone was demonstrated by John F. Mitchell and Martin Cooper of Motorola in 1973, using a handset weighing 2 kilograms.
A mobile phone is a portable telephone that can make and receive calls over a radio frequency link while the user is moving within a telephone service area. -
Tablet
The first tablet was the Microsoft Tablet PC, created by Bill Gates.
A Tablet is a mobile device, typically with a mobile operating system and touchscreen display processing circuitry, and a rechargeable battery in a single, thin and flat package. Tablets, being computers, do what other personal computers do, but lack some input/output (I/O) abilities that others have.
