• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

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.

    Software Software is the written programmes and associated documents pertaining to the operation of a computer system. This is stored in the read/write memory. There are two main types of software: 1 .Operating Software (O.S) An Operating System is a software program or set of programs that mediate access between

  1. Hardware Choices and Operating System.

    It works on all operating software's. This includes windows, mac and Linux. It has different icons to that of Microsoft word so using it for the first time will be difficult. Not a lot of difference would be made. The only difference is that you will not be paying for it.

  2. Choosing the best harware for my system.

    Easy to get as it can be bought at any computer shop. Hard for a new computer user to use as it is a very complicated piece of material. I don't need to worry about anything because 2GHz is average at processing.

  1. GCSE ICT - Imput devices.

    all the data was lost, they would have to restart from the last place saved and this would mean that they lose every thing that was taken out or returned after the last back up tape was copied. If they have a back up copy from the evening before the

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

    Customer Product Completion - customers are informed about the progress of their product through the customers preferred choice; for example through the phone or email. The information that a sales worker could say would be that the customer would receive their product in 4 working days (working days are Monday to Friday, not Saturday or Sunday).

  1. Input and output.

    Each button can be programmed to follow instructions. An overlay sheet is placed on the grid with an explanation for each button. They are used in primary schools with young children. Many modern fast food restaurants have overlays with either a description or picture of the meals that are available to make ordering easier.

  2. 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.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work