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The Computer Charles Babbage
The Difference Engine was like a calculator, an instrument that served a single function, which was the calculation of polynomial functions. The Analytical Engine was a computer, a piece of hardware that could perform multiple functions, depending on the software you ran on it. It was the first programmable computer design.
It weighed around 13,600 kg and was 2.4 metres tall and operated with 21 decimal places. -
The Telegrah. Samuel Morse
The telegraph was used by pressing his fingers, he allowed the current to pass for a certain period of time and then cancelled it. These pulses can be transmitted to a distant receiving apparatus with the help of a single cable for the transmission of coded text messages, such as Morse code, via radio communications.
The language used is Morse code, which transmits different lines of chosen words character by character through a particular encoding. -
The telephone. Antonio Meucci
Meucci used a liquid transmitter similar to Gray's design to create the first telephone. The vibration of the diaphragm caused a needle to vibrate in the water and this varied the electrical resistance in the circuit.
Antonio Meucci built it to connect his office to his bedroom so he could talk to his sick wife. -
The Radio. Guillermo Marconi
The first radio was a portable device weighing about ten kilograms, made from the lead sulphide crystal known as galena. It was impossible to change the dial, although there were still very few stations. -
The television. John Logie Baird
The television transforms the electrical signal it receives into the image we see on the screen. It generates a beam of electrons, the intensity of which is modulated by the deflector coils, which is focused and accelerated to produce a point of light on the screen. -
The Tabley Alan Kay
It was the American engineer Alan Kay who first proposed something very similar to a tablet in 1968. That idea was christened Dynabook, a computer for children of all ages weighing less than 2 kilos and with a graphic screen capable of displaying at least 4,000 print-quality characters. -
Movil Phone Martin Cooper
These devices had such limited functions as only making calls, as well as being considerably large in size, which is why these phones were known as bricks.
They weighed 800 grams, were 33 centimetres long and had a battery life of just 60 minutes.