Hardware Types Used In Computing Computer Science Essay

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It works by the user typing a key from the key board which gets displayed. The keyboard also allows going to different Softwares with out using the mouse.

For a typist it is very easy to use because the person is experienced and will know where every key is.

For inexperienced it is very hard to use because he will be not used to it and will find trouble using the keyboard.

You can make it any size It is more presentable than handwriting because in hand writing the letters can go bent and may not look very nice.

It gives you wrist problems after working on it for about 1 hours or two hours for which a person will not be able to work for few hours.

The keys are kind of thick so it is easy for a person to type easily and can have his job done really fast.

It could easily get damaged because of any liquid falling on it.

MOUSE

£5

The arrow displays on the computer and you can select different options. You could cut copy and paste by clicking the right mouse button it also has a small ball under the mouse or a laser which makes the mouse move easy and fast.

It is easy to move around the cursor because the mouse is being controlled by the person who is using it so there are less chances of making mistakes with it.

It has a high chance of breaking because if it is dropped then the mouse can be wrecked or damaged and may not work again.

It is easy to control the mouse because the mouse is sensitive or else it has a ball which makes it easy for it to move around.

The ball inside could get lost when cleaning which would make the mouse useless and the person will have to buy a new one.

It is light because it is also small which makes it easy to have a full grip on the mouse and it is easy to move around.

If it is a laser mouse then the light can damage the monitor or if directed towards eyes then they can also be damaged.

SCANNER

£99.00

When you put a information on the scanner it displays the same information on the monitor and the information can be changed as well.

Instead of typing information all over again you can scan it and print it out which will make easier and do the work much faster.

Sometimes the scanner does not scan properly because the paper could be misplaced

It is fast and it is also reliable because that is its use. That is what it is built for.

The screen of the scanner can crack with any hard stuff falling on it which would cause a problem when scanning and may give accurate information

When scanning then whatever you scan the colour is scanned exactly and there is no fault in the information.

It takes up a lot of space because of its huge size and so can cause problems and can also be broken if it is toppled over by it being pushed by someone.

PROCESSOR

£90

It sends signals to the computer to make it function.

It comes with the computer so that means that you don't have to order it so it will for free.

The computer will not work with out it because it is the main part of it so the person you will have to order one.

It is hard to get damaged because it is fully protected by the tower and can also be easily located.

It is expensive because it is the main component of the computer so the computer will not work with out it.

It can stay for a long time and can give you good processing speed depending on the process you have.

It is sensitive material, so it can break easily if taken out and handled improperly.

STORAGE

£60

It holds everything on your computer because this is the biggest storage device, every computer has one.

You can store a lot of memory In it because that is the main storage.

The more memory a computer has the more slow the computer works.

The more memory the computer has the more work you can save

You can get virus on the memory by installing corrupted programs.

It works fast if you have less memory in it.

When the hard drive gets damaged your saved works are no longer there .

USB

£5

USB works by putting the USB In the USB slot.

It is small so you can carry it around with you and insert it in computer or laptop.

It can get lost easily because of its minute size.

You can put your password on it to protect private data.

You can forget your password which could cause you losing data.

If the computer memory has been full up then you can use the USB.

When it gets damaged what ever is saved in it can be lost.

RAM memory

£15

It is placed on the right side of the tower which makes the computer work faster

It can be taken out and be changed with a different RAM with a higher memory

It can get damaged if taken out of the tower and dropped

The use of it is not only for a computer but it can also be used for a laptop

If you have less ram then your computer will work slow.

The system would not have a lot of memory taken up by the RAM

The RAM can be very expensive to get repaired

LASER PRINTER

£150

A beam of light is shown on a paper and ink is exited from the cartridge which then is put on the paper

The quality of a laser printer has a very high quality

It is very expensive because it is very high quality

When the paper is being printed it does not make a loud noise

It takes a lot of space in the room

The amount of paper that get printed is a lot in a little time

If you press a wrong button it can get damaged

MONITOR

£30

It receives information from a part of a tower and it gets shown on the monitor

You can visualise what you are doing on the computer and identify mistakes.

If the light is too bright on the monitor then it can damage your eyes.

Occasionally it does not take a lot of space on your desktop because of its size.

If the monitor gets damaged whilst your on it, it can loose what you are doing

It can display media on it by out outputting data and information.

If it is flat screen it can get a crack on the screen if something hard is chucked on it.

This table is showing the Alternatives of the devices, the way it works. It also shows its advantages, disadvantages and the differences it would have made If I used it.

Alternatives

Name of device

Alternative

The way it works

Advantages

Disadvantage

Difference it would make if I used it

MOUSE

Wireless mouse

You move the mouse, the laser sends a signal to the screen which moves the curser

You can use it from a far distance for e.g. a person can be on his bed and move the mouse around.

The mouse can get lost because it is not very big and because it is not attached to the computer.

It would be easier if I used it, because I could lie down on my bed and do it. It will not be very good as well because I will have to buy batteries very often.

There is no wire on the mouse so no one would trip over it.

You have to change the batteries which will make it expensive in the long term.

A wireless mouse is much easier to use than the mouse with wire because some times the ball stops rolling.

The wireless mouse are more expensive than the normal mouse because it is good quality.

KEYBOARD

Wireless keyboard

A keyboard works by typing buttons on the keyboard which gets displayed on the monitor

You can use it from far distance because it is wireless

The key board can get stepped on and broken if it is left on the floor.

It would be easier because I could relax and do my work. I could also walk around with the keyboard and do my work.

It is wireless so no one can trip over the wire.

You will need batteries for the key board which is expensive in the long term.

You can relax and do your work as in you do not have to sit right next to the desktop and work and you can spread your legs.

It is expensive because it is wireless and it is better than normal the normal keyboard.

SCANNER

Digital camera

What ever you put in the camera it displays the same information but in a better quality

You can store documents or memory of files

It is fragile so it could get broken easily if it drops.

If I used it would be easier because I would see the picture more clearly and it would also look better.

From the camera you can scan the picture on the computer

Sometimes the picture could be bleary because of some problems.

It copies the picture very quickly and very clearly.

It is very expensive because it is very high quality

MONITOR

TFT

It work normally the same as a normal one

It is more colourful because of it's quality.

TFT monitors can be really bright and can also damage you eyes.

It would save a lot more space for on the desktop and I could leave any small thing next to it.

It is slim so it can be placed on the desktop with ease.

They are more expensive than normal ones because it works faster than that

It is very light which makes it easy to move around from on place to another place.

If you hit the screen with any thing it has a crack init

HARDDRIVE

FLOPPY DISK

It saves the things you save on it and it keeps it safe

It stores a lot of information on it depending on the memory.

It can get snapped easily because it is plastic.

It would be harder to because it does not carry as much as memory as a hard drive.

It is cheaper than a hard drive because hard drives hold more memory

It is very slow because it was made in the 1900's.

It is portable and small so you can carry it around with you where ever you go.

It does not have much memory as a hard drive.

USB

(1 GB)

8 GB MEMORY

You insert it in the tower and it keeps what ever you save in it

It stores a lot of memory it has much more space than a USB.

It can get lost easily because of its size

It wont make a difference it will just install more

It is portable you could carry it any where

It could break easily if dropped.

It is small and you just have insert it in the computer for it to work

It could get virus on it if corrupted files are put on it.

RAM MEMORY

4 RAM GB MEMORY

It is in the tower which it work faster

More memory can be installed

It can get lost because of it's small size.

It wont make a difference

It is protected in the tower so it will be hard to break.

If it gets damaged then you will have to buy another one

It can be used easily.

The more GB it has it has the more expensive it would be.

LASER PRINTER

INK JET PRINTER

A jet of ink is blasted on to the paper through an nozzle

It is standard quality because it prints out the picture you want.

It is not good as a laser printer because it is not fast as a laser printer.

It would be harder because the wires would make it very difficult and it would take a lot of time and will not give a good copy as laser printer.

It is cheaper than a laser printer because laser printer is a very high quality printer.

It takes time for paper to be printed out because it is not very good quality.

It is small compare to the other ones so it takes less space.

It has too many wires which makes it harder to put it in the printer.

CPU (PENTIUM)

CPU (K6)

It send signal to the computer to make it function. With out this the computer will be useless.

With out this the computer will not work.

It is more expensive than a CPU because it works faster than it

It would make it easier because it will work faster

It is protected so it is hard for it to be broken

If it breaks down the whole computer will shut down and the work in it will be at risk

It is free because it comes with computer.

If this is lost then you will have to buy a new one because the computer will not work with out it.

Software

Software are devices which are shown inside the monitor and these devices can never be touched. e.g. Microsoft work, Paint, Microsoft access etc

There are 2 main types of software.

1.Operating Software (O.S)

2. Application Software

The operating software has to be in the computer or else the computer will not work.

The application software is normal application e.g. paint Microsoft office.

There are 2 types of operating software GUI (graphical user interface) and CLI (command line interface).

Type of O.S

The Main Functions

Advantages

Disadvantages

GUI

It shows icons and colours pictures and applications. it works like the (CLI) but in a better way because it show pictures ect.

It can hold a lot of icons and application in it so he can go on to the application and work on it.

It can sometimes be very hard to use it because of using it the first time.

It is easier to use than (CLI) because (CLI) is just a blank screen which does not show any information to the user and he will be able to work properly.

It takes quite a long time to open the application such as Microsoft office which will consume a lot of time.

It is easy to use for anyone because they can see what they are doing because they can tell by the application.

If the icon is deleted from the control panel then it will not be there anymore, so he will have to buy a new one.

CLI

You type something and the computer gives you the answer.

After a person learns the commands then it will be very easy and fast for him to use and will not consme time.

It is hard to use because it is just a blank screen. If a person tries to use it then it will be hard because hardly anyone uses it and he will not gat much help.

It works faster than (GUI) if anyone is used to using it then they will get their work done quicker.

If you do something wrong you have to start all over again which will consume a lot of ime.

If he knows what to do then it is going to be easy for him.

It is going to be much harder for a person who does not know much about it and takes a lot of time to learn the commands.

Here are some software I used.

I used internet and Microsoft word

I think it would have been harder if I used it because I have never used it before.

If I used CLI it would have been harder for me because I don't know any one who uses it and neither used it.

Name of Application

Price

Main Functions

Advantages

DisadvantagesApplication Software

These are the application I used whilst doing my work.

1. Internet

2. Microsoft word

3. Micro soft access

4. Paint

Internet

£10-£30 a month

It gives you the information you want by browsing the internet and accessing all the pages. Softwares like this are called internet browsers.

Easy to use because you will just have to type in what you are looking for and it will be there.

It can get virus on it by going on some sites which can damage your computer straight away and you may have to reboot it or else buy a new one .

You can find out almost any news you want on the internet by browsing on it.

You will have to pay for it monthly depending on the one you have. Some internet cost much more than other ones.

It saves every thing on the history so if you want to open it up faster the you will just have to go on it and click expand.

Children might go on it all the time and because of this their eye site might get weaker and they may not want to get of it which will affect their studies because they will be so much in the internet.

Microsoft word

£50

Micro soft word is used by many people for making reports and for making essays. People also write letters to each other using micro soft word.

It is very easy to use. It has different font size with which you can make the size bigger and smaller and also has word art with which you can make your more stylish.

You cannot draw so you will have to go on paint something there and then paste it on the page.

It has a spell checker which underlines the error in red so you can delete it straight away and not have the mistake in your work

It takes time to open up which will waste a bit of your time.

You can use head and footer. It can be written in different colours and you can type in any language e.g. Arabic

It does not have a calculator so you will not be able to do any sums on it

Microsoft publisher

£50

Micro soft publisher is used for making posters, leaflets, postcards wedding invitation.

It is very easy to use because all the information is there already and you will just have to design it and write few things.

Microsoft will not always give the best features because it does not have everything you will want.

Microsoft is a very good in many ways meaning making wise because it is not specified in making just one thing, it can be used to make wedding invitation etc.

Microsoft is a programme which is there in the computer from the begging, if it is deleted then you will have to order a new one and t will cost you.

This will be easy for any one to use because a lot of people use this a lot of the times to make posters, leaflets etc.

The programme can make you get confused because there be so many pages and they all look the same.

paint

£35

Paint is used for drawing and painting. People also go to paint to for making logo for their job.

You can make any shape on paint because it has so many different tools.

You cannot do sums on it so you will have to go on the calculator which will waste you time.

It has a lot of different colours with which you can make your drawing look better and also brighter with so many different colours.

You can do mistakes a lot of the times because you will have to control the tools with the mouse.S

You can type on it so it will save a lot of time because you will not have to go to another application to type .

It is hard to draw with the pencil because the hand keeps on shaking and the drawing goes everywhere.

These are the alternatives of the application I used, it's advantages, disadvantages and difference it would have made if I used it.

Name of Application

Alternative Application

The way it works

Advantages

Disadvantage

Difference it would make if I used it

Internet Explorer

Mozilla Firefox

It gives you the information you want by browsing the internet and accessing all the pages. Softwares like this are called internet browsers.

You can download images and videos for free some the internet and save a lot of your wages.

Some times it takes time for it to come up and will waste time. Sometimes it might not let you access on some sites.

It won't make a difference because both of the application do the same things but mozilla firefox warns you if the website has virus in it.

You can get almost all different types of information you want and wuill not have to go to people to getb the information.

It can get virus by going on some sights which can damage the computer completely.

You can communicate with people around the world which will build up peoples friendship.

Children can go on it and watch movies which are not appropriate for them.

Microsoft word

WordPad

You type the keys on the keyboard and it comes on the screen by sending an electrical message.

If you make mistake you can correct it easily.

It takes time to open up which will waste time.

It would be harder because it has less number of tools, Microsoft word on the other hand has lots of tools and lots of ways to edit and correct your work.

You can change the size of the letters. It is also simple and plain to use.

It is going to be hard to use it because most people use Microsoft word so they will not get any help for them.

You can change the font and make it more stylish.

It is not good as micro soft word in many ways as in doesn't have enough features.

Micro soft Publisher

£50

Micro soft publisher is used for making posters, leaflets, postcards wedding invitation.

It is very easy to use because all the information is there already and you will just have to design it and write few things.

Microsoft will not always give the best features because it does not have everything you will want.

Microsoft publisher will be realleu easy for me to use because there are many people who use it who I can get help from and do my work

Microsoft is a very good in many ways meaning making wise because it is not specified in making just one thing, it can be used to make wedding invitation etc.

Microsoft is a programme which is there in the computer from the begging, if it is deleted then you will have to order a new one and t will cost you.

This will be easy for any one to use because a lot of people use this a lot of the times to make posters, leaflets etc.

The programme can make you get confused because there be so many pages and they all look the same.

paint

Adobe photo shop.

It is a bit similar to paint but works a bit differently. But in the end they do the same job.

You can put so many different pictures on paper and make the paper look better.

If a person does not know how to use it then it will take him a lot of time and he may do something wrong on it all the time.

It would be harder because it has too many tools and can get complicated to understand and so for a beginner I would suggest paint.

If a person knows what to do in it then he can finish his picture of faster.

You will have to download it. It does not come free.

It has more features than paint so the picture will look better than it.

It takes time to open up so it will waste a bit of time.

This is a picture of internet explorer

This is a picture of paint

This is a picture of Microsoft word

THIS IS A PICTURE OF MICROSOFT PUBLISHER

Conclusion of hardware and software.

Hardware is important is because with out the hardware the computer will be able to work but it will be really hard to use it. For e.g. if the monitor of the computer is missing then the computer will work but nothing will be able to see anything and the user will not know what he is doing. Software's are the most important thing of the computer because with out the computer will not run.

Input

Input devices are explained in the table which is below.

Device

Speed

Errors that can be made

Way to correct errors

Keyboard

If the user is experienced then he will be able to type very fast. It is measured in WMP.

You can type the wrong key e.g. instead of pressing h a person can press g.

Delete it using the backspace or else by pressing the delete button.

Mouse

Just move it around and the arrow will follow the mouse in the computer and is really fast.

You can go on a wrong application and click it e.g. instead of clicking paint he can click on games.

Press the red cross which is on the top corner of the screen on the right.

Scanner

Depends on the scanner a person has. It can have a range from around 5 secs to around 30 secs.

The paper can come out blank or a bit of it might be cut. E.g. Might not be placed properly.

Put it the right way round and make sure that everything is aligned properly.

Keyboard

I used a keyboard because I am used to use a keyboard.

To detect errors In my work I typed slowly to make sure I did not press a wrong button.

I corrected the errors by using the spell check feature which notifies me of my mistakes.

To prevent errors in my work I made sure I proof read my work several times to locate all the errors in my work.

Mouse

I used a mouse because it is easy to move around.

To prevent errors I used the mouse slowly and made sure I clicked on the right thing.

I corrected the errors by clicking edit and undo or if I'm on a program then just click the back button.

To detect errors is not hard because you will straight away spot any mistake.

Scanner

I used a scanner because it gets the exact picture.

To prevent errors I placed the paper carefully on the screen.

I corrected the errors by making sure all the wires and the paper are right.

To detect errors I would realize because the final thing would not come out right.

It is very important that data is entered correctly. Validation and verification are both ways of checking the data that has been entered into a computer to see whether it is correct or not.

Validations

Validation is simply to prevent human errors. For e.g. In Microsoft access data base the validation rule is to stop errors from happening. The validation happens automatically after it has been set up. If you write something wrong then the validation will prevent and warn you of the mistake. It is mostly used in data base and plays a big part in life. For e.g. only answer in 'yes or no'. Here is another example, suppose you type in a secondary school pupil's year of birth. It is likely to be between 1987 and 1993. A year of birth such as 1966 is impossible. The computer can be programmed only to accept numbers between 1987 and 1993. This is a range check.

Verification

Verification is a check to ensure that the data entered exactly matches the original source.

There are 2 main methods of verification:

Double entry (typing the data in twice and comparing the two copies).

Proofreading data - This method involves somebody checking what is on the screen is the same as on the input document. Again, this is time consuming and costly.

Effect of inaccurate data

Anything which is inaccurate is a huge disgrace, even a little mistake can effect the customers, if the link are not working then it will be very embarrassing for the company.

Data

Effect

Way it can be prevented

Spelling mistakes in website

Customers will think low of the company and spread rumours to other people saying the bad mistakes of the company. The spelling mistake will confuse the customers very much, the company may be trying to tell them a specific thing and they may think that the company is trying to tell them something else.

These errors can be prevented by the spell checkers and proof reading, it could also prevent the errors by having the grammar checker on.

Hyperlinks not linked correctly

If the hyperlinks are not connected properly then the customers will have many problems because they will easily get lost. It will definitely put the company in to real shame.

After the website has been made then many people should be called to check carefully if the hyperlinks have been connected properly before it is put in the internet.

Output

This table tells the way the devices work, it also tells the advantages and the disadvantages of the device and where it will be the best place for it to be used.

Device

Type

The way it works

Advantages

Disadvantages

Best place to use it

Printer

Laser

Laser is hit on the paper and then the word is formed. A really powerful laser is used.

It prints out very good because it gives put very clear pictures.

It is fragile so if it is dropped then it will break very easily.

Laser printer are used in schools and offices because lots of work need to be printed out which has to be good quality.

It does not make noise when it is printing

It is very big so it will take a lot of space in the room.

The printer is very fast because it can print multiple documents at once.

It costs a lot because it is very high quality. It is also very hard to use because it has got so many buttons.

Inkjet

The inkjet printer uses ink to print out documents or maps and then it uses heat also. That's why the paper comes out hot.

It is cheaper than laser printer so a person can buy something else also.

It is not good as a laser printer so it will not give a accurate picture as laser printer.

Inkjet printer are used in homes because it is small and gives out a good piece of work.

It almost gives you the picture you want.

When the paper is printing the printer makes a lot of noise for which people might get disturbed.

Laser printers are easy to use compared to the other printers because it does not have so many buttons.

You have to buy a ink cartage after the ink finishes and it will cost a lot in the long term.

Dot-matrix

It has small pins and moves on the paper to form a letter and this type of printer is mainly used for maps or graphic.

9-pin is cheap to buy compared to the 24 pin once.

It is slow so it will take a lot of time to get all the papers you want.

Dot-matrix printer are mainly used in book publishers to publish maps or pictures.

The more pins it has the more better the quality is. E.g. 24 pins give a good quality.

It is not good as a laser printer so it will not give very good pictures.

it is very easy to use compared to the other once because it is very simple.

They make a lot of noise when it is printing the papers out.

Monitor

TFT

The TFT monitor outputs the information that was processed by the computer. It outputs the data so that we can understand it.

It does not take a lot of space so it will leave a lot of space on the desktop.

It can get pushed over easily because it is very light and get smashed straight away.

The TFT monitor is mainly used in homes because it gives you good quality and also takes up less space although it is more vulnerable to damage.

The monitor looks good and it looks very fancy because of the slimness.

If anything hits the monitor e.g. lollypop the screen will have a crack.

Your eyes don't hurt. You can make the colour go brighter or darker.

It is fragile so it can get damaged very easily.

CRT

The TFT monitor outputs the information that was processed by the computer. It outputs the data so that we can understand it.

It is cheap compared to TFT because it does not give very good quality as TFT.

It takes a lot of space on the desktop and

The CRT monitor is used in offices and big workplaces where accidents are really likely and therefore CRT is used where space is not a problem.

It is heavy therefore it won't fall very easily.

If any thing hard hits it the whole glass can get smashed

The screen is very hard so it will be very hard to get damaged

The screen is small compared to a TFT monitors

After completing my work I have found out that the output devices I used were probably the best ones because it did not gave me any difficulties when I was doing my work. It was in high quality in which did my work and also very easy.

Conclusion

I think the system I used for this task is the perfect one, firstly Microsoft publisher was designed for that purpose and now that the system is built you can access any of the deals by the click of a button whereas before you had to spend 5 mins looking for and locating the file. The publisher software has made it easy to advertise our company by allowing us to create a website so that the whole world will know about our company.

Any extra hardware the company will need to use this software:

Name of Hardware

The way it works

The way it will be used by the company

Modem

The modem picks up a signal from the air and them allows connection. You need it to connect yourself to internet.

The company can access the internet using the modem to research or to find out about other things.

webcam

The webcam allows digital video to be sent around the world for example someone can see what another is doing using a webcam.

The company can use this by seeing someone else in another room.

microphone

This allows sounds to travel to certain distances.

The company or the members might need to speak to one another about something important.

Name of Hardware

The way it works

The way it will be used by the company

Webcam

A web cam is like a live camera which shows a persons actions whilst it is on. It works only for the people who have internet , if a person does not have internet then the webcam will be no use for the user.

They cam keep a picture of him and display it on his information, they can also us the picture to recognise if the person gave any problems to the company before. It could also be used for security.

Plotter

Pen plotters work by moving a pen on the paper. The pen can only move up, down left and right, they can not move diagonally or in curves. The pen plotters work really well and give a very good accurate graph.

The company can use the pen plotter for graph, which gives all the information to the customers about the price, they can also use it to check the companies own thing such as seeing how many customers they have had over the past few years.

Flash Drives

Flash drives are used to move one data from one computer to another. It is really easy and it is no hassle because the information in the flash drive transfers it to the other computer safely.

The company can use it to keep private information on it will be safe.

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