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computer
it was invented by Charles Babbage.
it was designed and primarily used to calculate artillery firing tables for the United States Army's Ballistic Research Laboratory -
telegraph
it was invented by Samuel Morse and other inventors.
It was the first electrical telecommunications system, the most widely used of a number of early messaging systems called telegraphs -
telefone
it was invented by Alexander Graham Bell.
The telephone is a telecommunications instrument that sends and receives sound such as voice messages and data across a certain distance -
radio
it was invented by Guglielmo Marconi.
They were developed mainly for ship-to-shore and ship-to-ship communication. -
television
it was invented by Philo Taylor Farnsworth.
it was invented for entertainmente. -
mobile phone
it was invented by Motorola employee Martin Cooper.
Cooper wanted people to have freedom to talk on the phone away from their cars. So in reaction, he and Motorola embarked on a project to create a more portable device. -
tablet
it was invented by Jeff Hawkins.
Some tablets come with an extra portable Keyboard that can be connected and used for quick typing
