Computors

About Tim Berners-lee

Tim Berners-Lee is a computer scientist who created the World Wide Web in 1989. He was born on June 8th 1955. He went to The Queen's Collage, Oxford. His Parents are Conway Berners-Lee and Mary Lee-Wood. He Wrote three book called Weaving the Web, The Original Design and Ultimate density of the World Wide Web by it's inventor.
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About Alan Turing

Alan turing worked for Britain's codebreaking centre during World War II. He was born on the 23rd June 1912 and died 7th June 1954 at the age of 41
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4 computer generations

First Generation computers were used in 1951 to 1958 the first generation computers used the vacuum tubes. There were 18000 vacuum tubes and it consumed 150 kilowatt of power.
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Second Generation computers were used in 1959 to 1964.With transistor technology, the second generation computer was made. Transistors were small, fast and more reliable for less power.

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Third Generation computers were used in 1965 to 1970 Third generation computers used things like the time and business tasks.

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Fourth Generation were made in 1971 and are still used now.
The development of microprocessor chips led to the making of inexpensive computers. These computers use a large scale integrated circuits and reduced the size and cost of computers.
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Input and output devices

An input is data that a computer receives. An output is data that a computer sends. Speakers and headphones are output devices that can play sound. You can control the output by turning the volume up or down. A digital camera becomes an input device when you connect it to a compute.A monitor is an output device. It displays all the information that has been sent to it by input devices. An interactive whiteboard is an input device that sends information about what is tapped or selected on a screen. A projector is an output device, it projects a picture onto the whiteboard.

Hard Drives

The hard drive is made up of a few circular disks stacked one on top of the other. A little arm moves over the disks and writes things to these circular platters, and reads them. When you save a file or create a new folder, think of these circular platters being written to and you'll have a basic idea of just what your hard drive is.

A hard drive is memory for a computer meaning when the power is removed the memory is still there. It is called a hard drive because the memory is a number of rigid aluminum discs not like the old floppy drives which were flexible.
A rigid magnetic disc fixed permanently within a drive unit and used for storing computer data

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Monitors

When it comes to computers, a monitor is an output device that displays video, graphics and text. The term "monitor" may also refer to any electrical device that displays digital imagery on a screen, such as a TV or a video projector screen.
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CPU (Central Processing Unit)

The CPU could be considered the "brains" of the computer. It is responsible for interpreting and executing most of the commands. A modern CPU is usually small and square with many short, rounded, metallic connectors on its underside. Some older CPUs have pins instead metallic connectors.
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Motherboards

The motherboard serves to connect all of the parts of a computer together. The CPU, memory hard drive, optical drives, video card , soundcard and other ports and expansion cards all connect to the motherboard directly or via cables.

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Ram/Rom

A random access memory or RAM is a form of computer data storage. A random-access memory device lets data items be read and written in about the same amount of time.
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Read Only memory or ROM is a type of "built-in" memory that is used with computers and other electronic devices. Hence the name, data stored in ROM may only be read; it is either modified with extreme difficulty or not at all. ROM is mostly used for firmware updates. A simple example of ROM is the cartridge used with video games; which allows one system to run multiple games.
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Raspberry