Chapter # 6 ( What is Transistor ? )

The invention of transistor played a wide role in evolution of computers because, transistor is a semi-conductor device.

In 1939, William Shockley, Walter Brattaid and John Bardeen invented the might invention of the "TRANSISTOR" in Bill Laboratories. (look at the picture.)

Transistor is a semi-conductor device which, works like a electricity switch is too much better than Vaccume Tubes. Transistor consumes a little amount of electricity and the computers that are being built with transistor technology are also in small size as compared of Vaccume Tubes computers.

In fact, that was the only transistor, by which smaller sized computer had been built by different companies. Today laptop computers which are too smaller in size as compared to others are also faster in speed and runs with a battery system and consumes a little amount of electricity voltage.

Chapter # 5 ( Evolution of Computers )

The research, finding, experiments and earliest inventions by scientist helper directly or indirectly the Amazing invention of today's Computers. Today's modern computers are combination on some "Switches".

Switches?
Switches are comprised of getting knowledge, controlling it and handling binary system data. We must know about these switches in order to operate computers efficiently and effectively. Binary system of computer had proved to be very much beneficial for on-off facility. A good switch is needed for this system.

World's first computers were accompanied by "Vaccume Tubes". These tubes were good for its time in Middle Age of computers but these tubes were not comfortable as compared to switches. Vaccume Tubes were consuming too much electricity voltage and systems were getting too hot after using a little time period. In Big Computers, after every 2 hours a single Vaccume tube became unusable. Therefore, scientists of that time started to find out its substitute or in other words scientists tried to invent something else that could be more comfortable for computers as compared to Vaccume Tubes.