The history of computing!

(Almost) Everything you need to know about computing!

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Who was Alan Turing?

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Alan Mathison Turing OBE FRS was a pioneering English computer scientist, mathematician, logician, cryptanalyst and theoretical biologist. He was the one who technically ended World War II. He was the man who cracked the Nigma code.

Watch 'The Imitation Game.' It's a true story about Alan Turing breaking the Nigma code!

The Imitation Game 2014 full movie

Input and Output devices

What is an input and output device?

An input device is something you use to get an output. A keyboard or a mouse is an example of an input device.

An output device is something like a printer, where you have to use an input device, like a mouse, to send a document to the printer to print it out.

Even more examples of input and output!

Input devices

Mouse - A device that allows you to click on websites, scroll through pages and generally get around the internet.

Keyboard - A keyboard allows you to press buttons with letters on them and they will appear on the screen. That's how I got these words up here!

Light pen - A light pen is what you would use on a touch screen like on your tablet for instance.

Tracker ball - A tracker ball can be used as mouse. However, you don't need to move it around, but have to move the ball in the centre to move the cursor.

OMR - OMR stands for optical mark reader. This can be used to read pen marks and writings.

Output devices

Printer - The printer will print out anything you will send to it by keyboard or a mouse.

Speakers - Speakers will make the sound louder than it already is. You can play music, podcasts or even a movie!

Headphones - Headphones will produce sound but only you can hear it.

Storage devices

What is a storage device?

A storage device is something inside a computer that allows you to basically save it. For instance, a USB is an exmaple of a storage device. You can save your Word Document on the USB and you can take it to another computer to work on.

The main storage device in a PC is the hardrive. You only have a certain amount of gigabytes to use, but the PC comes with a lot of space.

You can buy different hardrives that can store more things than your computer already has. You can call this an upgrade for your computer.

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Processing devices.

What is a processing device?

A processing device is a CPU, a RAM, a power supply and so on.

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Hard drive

The hard drive is the internal storage device. The bigger hard drive you have, the more stuff you can save.
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Binary code

Binary code makes up everything you see on your computer right now. That picture you see? It's all made up of 1's and 0's. This text? That's made up of 1's and 0's. Everything you see is made up of 1's and 0's. That picture you showed your friend on instagram? That is made up of 1's and 0's. Basically everything you type or see is made up of 1's and 0's.

Here's a video of how to read binary!

How To Read Text In Binary

Computer Network

What is a computer network?

A computer network is basically two or more computers connected to a workstation. These computer are connected with a network cable or wirelessly. The cables are all connected to a hub and these computers can share documents, files, pictures and videos. Basically everything!

What you need...

The 3 different types of networks

Bus Network

What is a bus network? A bus network only contains one cable and many work stations are connected to that one cable. If one node fails to operate, the rest can still communicate with each other. It is really cheap to buy but maintenance costs get higher over time.
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Star Network

A star network is a local area network (LAN) in which all nodes (workstations or other devices) are directly connected to a common central computer. Every workstation is indirectly connected to every other through the central computer. In some star networks, the central computer can also operate as a workstation. If a cable fails, majority of network is ok. However, it requires a lot of expensive cabling.

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Ring Network

    A ring network is a network topology in which each node connects to exactly two other nodes, forming a single continuous pathway for signals through each node - a ring. Data travel from node to node, with each node along the way handling every packet. Transmission of data is simple. However, if a cable breaks, the whole network breaks.

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