In this you will learn about different type of computer.
| Type of Computer | Description | Advantages | Disadvantages |
| Mainframe computer
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Mainframe computer is an extremely large. It is use in banks or government department. These computer store large amount of data. |
It is capable of making big job which make use of there fast processing speed.
Good at solving difficult problem solving and would take ages for the small computer to do. |
Mainframe are so large that they could take the whole room. It’s very difficult to set up. Expensive to operate and maintain and require professional staff to look after them .
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| Desktop of Personal Computer( PC)
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This is a general purpose computer made up of different part or component.
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Most of the spare part are often cheap because they are very standardised.
They often have much faster processor than laptops with the same price. They have fewer problem with overheating than a normal laptop because there size are bigger.
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It has many wire hanging around and it difficult to be with separate components.
File have to be copied and stored on portable disk especially if you went to a cafe you will need for your laptop.
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| Laptop or notebook
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This is a computer where everything or component are in one unit. This meant that we can travel anywhere with this device. | It’s portable.
You can work anywhere especially if they can connect to Wi-Fi. |
They can be lost and stolen easily.
Battery power is limited. Laptop can be more compact so they can overheat easily. |
| Tablets
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It kind of like a laptop but smaller and again portable. The biggest difference is that it s user interface is all through touch. | It is very portable and also easy to use.
Quick to switch on. There are thousand of downloadable apps. |
Not all have 3G or 4G.
Can’t make phone calls. Touch screen can be difficult to type. |
| Personal Digital Assistance (PDA)
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This is a small handheld device or computer with a touch screen popular in the 1998-2004. Some of the PDA have keyboard behind or underneath the screen. These machine have develop very fast. This is use for writing email, notes , GPS and other functions. | Extremely portable it can fit in your pocket and bags.
Web and Email connectivity. They often have Qwerty keyboard which is easy to use |
The keyboard are very small so people who with big thumb would find it very difficult to type.
Screen are to small and difficult to read long documents. |
| Smartphones
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This is an advance mobile, it run on solid stade drive which cannot be stored in the laptop or pc. This has lots of feathers such as Web browser, high resolution touch screens, GPS, Camera and media players. | Online access to data.
Better web browser than a simple mo line phone. Just one device can finish task at home or work. |
Similar to PDAs due to their size.
The cost of these smart phone are similar to laptop. |
IGCSE ICT 