A computer has four main types of hardware in a computer which is: Input An input is a hardware device which is used to store data into the computer. Process Process is a hardware which manipulates the information in order for you to read it Storage Storage is a type of hardware than enables you to save your work or things on your computer. Output An output is an hardware that is used to transfer the computer data in forms so you can be able to read it. There are 9 hardware that I am using, these are the following. Input.

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Keyboard, Scanner, mouse Process Intel Core Duo Processor (2 GHz) Storage RAM, ROM, USB flash drive Output Printer and monitor This table is the hardware that I am going to use and how they work. Name of device Price The way it works Advantages Disadvantages Keyboard i?? 20 A keyboard is an item that you can touch. It has many different buttons each with different letters, symbols and number. Once you press one of these buttons the central processing unit sends message to the monitor and it appears on your screen and for you to understand.

The advantage of a keyboard is it comes in several types including QWERTY concept. The disadvantage of a keyboard is that it is portable so you can’t take more than a certain distance. The other advantage of a keyboard is that it has several buttons on it which are like shortcut for e. g. page up and page down. Also another disadvantage is that the wires of the keyboard could tangle up or cause a hassle or an accident. This keyboard is less complicated than others. You have to be careful not to damage the buttons. Mouse i?? 7 A mouse is a device which you can touch and move around.

The way you use it by moving the mouse and an icon on the screen will appear which enables you to go on different things e. g. application. The advantage of a mouse is that it comes in several types the laser sensor mouse. The disadvantage of a mouse is that it is not portable so you have to stay close to the computer therefore it might cause problems. Another advantage of a mouse that is very easy to control so nearly anyone can use it. The other disadvantage of a mouse is it can only work well on certain surfaces that are flat not on rough surfaces. It is shaped to the size of the hand.

It is not very accurate whilst using. Scanner i?? 175 A scanner is made for converting texts, pictures etc into computer format this works by inside the scanner it has a ray of light which shined onto the document and then the light reflects back onto the laser and the scanner transfers onto the computer. The advantage is that you can save your documents or pictures inside the computer and put them on certain websites that you want. The disadvantage of the scanner is that the scanner could take up a lot of space on the computer and also make quite a lot mistakes.

Another advantage is that the scanner especially the flatbed scanner is very accurate. The other disadvantage is that the document or the picture could lose of it qualities while processing it. It is fast and quick to produce the document. Space images might lose some quality during scanning USB flash drive i?? 5 The way that the USB works is that it is basically an portable extra memory that you can save many things according to its memory capacity The advantage of an USB is that the memory capacity comes in many size such as 1GB, 2GB, 4GB etc.

The disadvantage of a USB that it can be easily damaged or broken. The other advantage of an USB is completely small, light and its portable so you can carry it around everywhere Another disadvantage of the USB that it doesn’t have any particular security and can easily be hacked into. It is faster than a disk. They can get virus inside, so your data inside will be at risk. Laser printer i?? 275 The laser printer is used for printing the work that you done on the computer into paper. The advantage of a laser printer is that they are very quite and produce very high quality print.

The disadvantage of the laser printer is that the cost of the laser printer is a lot more expensive than most printers. Another advantage is that it is very quick and sufficient to print. It is more expensive to repair than the ink-jet printer. It is ideal for offices use due to the how quite it is. The ink cartages is quite expensive. Hard disk(250GB) i?? 85 The hard disk is the main part of the computer where all the application is stored as well as data file. The advantage of a hard disk that you don’t lose any data even when you switch off the computer.

The disadvantage is that if the hard disk crashes often then the data can be lost. Another advantage is they can store large amount of data. The hard disk can stop the computer if it crashes. Also another advantage is that every single computer comes with one which means you don’t have to but it separately. Also the computer comes with hard disk fixed and it can be difficult to transfer data to another computer. (CPU) Intel Core Duo Processor(2 GHz) i?? 200 This is the brain of the computer. In the CPU all of the calculation and sorting out are done here. It is small so it takes less space.

It is very expensive. It is very fast because it carries millions instruction per second. Not as fast as a 5GHz. Used in most common computers. Easy to find in most computer shop. TFT monitor i?? 110 A monitor is a screen that reads the/ receives messages from the computer and puts it into such a form that is understandable. The advantage of a TFT monitor is that it makes a lot less noise so it is not disturbing when you work. The disadvantage of a TFT monitor is that it is more expensive than the CRT monitor. Another advantage is that it takes up less room and also causes less heat.

Also another disadvantage is that the screen or the whole monitor can easily get damaged, Also it gives the best quality. Also the speakers are not very loud on the TFT. 1GB RAM i?? 90 A RAM is a type of chip that which stores the memory as long as the computer is switches on and it is used to go onto different application. The advantage is that it can be used for back up memory. The disadvantage is that if you open too much application than the computer can slow down a lot. Another advantage is that you can changed the RAM so you can upgrade it.

The other disadvantage is that if your RAM is full up then it crashes and you haven’t saved your work then all your work is lost. 1GB is suitable for a normal computer. 1 GB can be access less work at a time than a 2 GB. Alternatives This table is for some the hardware and there alternative also there advantage and disadvantage. Name of device Alternative The way it works Advantages Disadvantage Difference it would make if used TFT monitor CRT monitor The way it works is that a screen that receives messages from the computer and puts it into such a form that is we can understand it.

The advantage of a TFT is that takes up less space in your room/ or on a desk. The disadvantage is that the screen is more fragile than the CRT monitor. The difference that it would make to use this that is you use the TFT monitor then is would disturb you less and create less heat in the room therefore it would be better to use the TFT monitor. Another advantage is that it causes less heat and less noise so you can concentrate more. Another disadvantage of the TFT monitor is that is more expensive than the CRT monitor. Another advantage is that the quality of the picture is of a high standard. It is quite hard to set up.

Ink-Jet printer Laser printer The way it works is that when you press a certain button then the motherboard sends messages to the printer to print an exact or almost exact copy want you wanted on paper. The way it does is by it drops extremely small droplets of ink onto the paper to create an image. The advantage of a ink-jet printer is that it is more much cheaper than the laser printer and the ink cartridges are also cheaper than the laser printer. The disadvantage of ink-jet printer is that it is nosier than the laser printer and the colour printing can still smudge after it has been printed.

The difference it would make is that the laser printer might cost more but it is worth it since it much better printing quality and it is much faster and also it would make less noise so it won’t disturb others. Another advantage of a ink-jet printer is that it is more compact than the laser printer and it is also quite fast compare to the dox-matrix printer. Also another disadvantage is that the colour printing can be very slow at printing than the laser printer and if you don’t us the ink-jet printer in a while than the ink could get dried up. It is ideal for home. It is ideal for home. Wireless Keyboard Keyboard

The way it works is that if you press any of these buttons immediately it sends it to the motherboard and it processes it and it appears on your screen which is understandable for you. The advantage of a wireless keyboard is that you can take it literally anywhere you want, also you don’t have to stay close up to the computer rather you can stay on your bed. This is very good because it prevents you from having the disease RSI. The disadvantage if a wireless keyboard is that it is more expensive than the wired keyboard, also some keyboard need battery to make them work and too much typing can lead to the disease called R.

S. I. The difference it would make if you use the wireless keyboard is that you are less likely to get the disease R. S. I and also wherever you are you can take it with you or you can sit away from the computer desk and with ease type on the sofa or the bed. Another advantage is that it is wireless so it doesn’t have any wires therefore it won’t get tangled up and be a mean to cause you hassle and it lowers the chance of having a accident due to that wire.