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Computer
Devices have been used to aid computation for thousands of years, mostly using one-to-one correspondence with fingers. The earliest counting device was probably a form of tally stick. Later record keeping aids throughout the Fertile Crescent included calculi (clay spheres, cones, etc.) which represented counts of items, probably livestock or grains, sealed in hollow unbaked clay containers. -
Television
The first practical transmissions of moving images over a radio system used mechanical rotating perforated disks to scan a scene into a time-varying signal that could be reconstructed at a receiver back into an approximation of the original image. Development of television was interrupted by the Second World War. After the end of the war, all-electronic methods of scanning and displaying images became standard. -
Telegraph
An American professor, Samuel F.B. Morse, began experimenting with sending communications via electromagnetic signal in the early 1830s. In 1838 he was able to demonstrate the device by sending a message across two miles of wire in Morristown, New Jersey. -
Radio
The idea of wireless communication predates the discovery of "radio" with experiments in "wireless telegraphy" via inductive and capacitive induction and transmission through the ground, water, and even train tracks from the 1830s on. James Clerk Maxwell showed in theoretical and mathematical form in 1864 that electromagnetic waves could propagate through free space. -
Thelephone
Alexander Graham Bell was an inventor, scientist, and innovator. He came up with and patented the first practical telephone. Bell’s father and grandfather engaged in a speech development program known as elocution, and as a result, Bell was inspired to study communication and speech. Antonio Meucci is credited as having created the very first telephone. -
Tablet
The history of tablet computers and the associated special operating software is an example of pen computing technology, and thus the development of tablets has deep historical roots.[1] The first patent for a system that recognized handwritten characters by analyzing the handwriting motion was granted in 1914.[2] The first publicly demonstrated system using a tablet and handwriting recognition instead of a keyboard for working with a modern digital computer dates to 1956 -
Mobile phone
An electronic device that people can use for data communication as well as telecommunication, a mobile phone has standard and special functions that are very helpful to connect with other individuals who use the device.
