Page
  1. 1
    1
  2. 2
    2
  3. 3
    3
  4. 4
    4
  • Level: GCSE
  • Subject: ICT
  • Document length: 897 words

Computer Systems

Extracts from this document...

Introduction

Computer Systems There are two main functions to a computer system; The Hardware and the Software. The hardware is the name given to the part of the computer that can be touched. The hardware is the name given to all the devices that makes up the computer system. Some examples of hardware are: Input devices Central processing unit (CUP) Backing store Output devices Hardware is the term used for the parts of the computer you can touch and handle. Hardware is the name given to the devices that make up a computer system. The hardware devices are split into two groups; they are input devices and output devices. Input devices are used to get data into a system. Output devices are used to receive data from the computer. Input Devices Input devices are used to get information or data in to the computer. The ideal input device would be one that would get the information in to the computer accurately with out human intervention; it would also be quite cheap. ...read more.

Middle

Each key acts as a switch, which closes when the key is pressed. Each key has a code, when a key is pressed the code is sent to the central processing unit. The CPU translates this code into an ASCII code (the code that computers use to represent characters on the computer keyboard), which is then used by the computer program. *Mouse A mouse is a device that when it is moved over the desk a cursor on the screen is moved. There is a ball underneath the mouse that rotates when the mouse is moved. Sensors pick up the movement to move the cursor over the screen. A mouse usually has two to three buttons that are used to make selections. *CD-ROM The CD-ROM makes multimedia possible because of it abilities to have a large storage capacity that is needed for photographs and video chips. CD-ROMs have many useful features, including: 1=they are quite easy to handle and durable 2=they can be used for multimedia presentations 3=600 MB of data can be held on one CD-ROM; hundreds of floppy disks would have normally been needed to store that amount of information. ...read more.

Conclusion

They print at 300 to 600 dots per minute. This improves the quality of the image. * They are quiet when in operation, compared with a dot matrix; the only sound that a laser printer makes is the noise of the cooling fans and the paper moving. * They are equip with cooling trays, for both input and output paper, so this means when they are in operation they do not need to be supervised. *Dot-matrix Dot-matrix printer use tiny pins in regular arrangements that are fired out to hit an inked ribbon that produces a pattern of dots on the paper. Dot-matrix printers are able to print in colour and they can display both text and graphics. They are impact printers, which can print through layers of paper. This means they can produce multi-part stationary. They are the cheapest printers to buy and run. Electrical signals Electrical signals can be sent from one computer system to a main computer system, which is remote from the terminals. Electrical signals can be used to control devices such a0s burglar alarms and central heating systems. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Hardware section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related GCSE Hardware essays

  1. Marked by a teacher

    Johns parents decided to buy a computer which can help John with his work ...

    3 star(s)

    The most important hardware is the RAM, because it will speed up John's computer, so the point is he doesn't have to care about the speed. The other important hardware is the USB. This will help him to carry his work around easily and continue with it in college.

  2. Computer Hardware, uses, advantages and disadvantages.

    - Most modern computers now use GUI applications. - Colour of GUI applications attract people's attention - When it is not properly built, it can be very difficult to work with. - It generally requires more memory resources than a non-graphical one.

  1. I will be describing and reporting about these three hardware items: monitor, mouse and ...

    The optical mice all function to ease movement in various ways. Pen Mouse is a specialized mouse that can be held like a pen, and when a button pressed the pen acts as a mouse. There is no mouse pad needed and the pen can be used while writing in

  2. Choosing the best harware for my system.

    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.

  1. Ict - Unit 2B

    When the department realises the faults and disliked areas they get improved or removed this helps the company to gain its main objective if the customers are happier then they will visit more often and pass on the good word so the company develops reputation.

  2. The organisation I have chosen to investigate is Europes leading specialist retailer of computer ...

    The stock module is the hub of their purchasing and distribution activation. It can be linked with purchase order processing, bill of materials, order entry, invoicing, sales analysis and job costing modules. The chief financer ensures that stock is updated automatically from the sales order processing, invoicing and purchase order

  1. I intend to produce a piece of software to enable young children to establish ...

    All of this information is available online, as examples of prior projects can be found, and also the work of psychologists Pavlov and Skinner, as my design is influenced by there theories. At present children go straight to the computer without any prior knowledge.

  2. Hardware Choices and Operating System.

    The processor makes the computer run faster. Some older programs may run slower on a core duo processor because it doesn't support multithreading. It only runs on 65 watts making it energy efficient. The bigger Intel core duo processor you want the more expensive it will be.

  • Over 180,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work

Marked by a teacher

This essay has been marked by one of our great teachers. You can read the full teachers notes when you download the essay.

Peer reviewed

This essay has been reviewed by one of our specialist student essay reviewing squad. Read the full review on the essay page.

Peer reviewed

This essay has been reviewed by one of our specialist student essay reviewing squad. Read the full review under the essay preview on this page.