• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month
Page
  1. 1
    1
  2. 2
    2
  3. 3
    3
  4. 4
    4
  5. 5
    5
  6. 6
    6
  7. 7
    7
  8. 8
    8
  9. 9
    9
  10. 10
    10
  11. 11
    11
  12. 12
    12
  13. 13
    13
  14. 14
    14
  15. 15
    15
  16. 16
    16
  17. 17
    17
  18. 18
    18
  19. 19
    19
  • Level: GCSE
  • Subject: ICT
  • Word count: 3207

GCSE ICT - Imput devices.

Extracts from this document...

Introduction

Input devices Keyboard The keyboard is usually a long rectangle shaped piece of plastic with rows keys. The keyboard is used to type letters and numbers into a word processor. They are also used for gaming; some keyboards have with special gaming features. A keyboard used to be used to give commands to operate the computer before there the invention of mice. A keyboard can be connected to the computer by USB port or wirelessly. Some keyboards are designed for use by people who are visually impaired. The Waterside library has a keyboard on every computer; there are two types of keyboard in the library, the average sized plain coloured keyboards (above left) used mostly people without eyesight problems and then the larger sized keyboards (above right) for visually impaired members with a contrasting coloured keyboard. The contrasting coloured keyboard makes it easier for the visually impaired to identify buttons on the keyboard. The good thing about the larger sized keyboard is that the keys help the user to recognise when they have been pressed with a nice distinct click. The libraries facilities are available to the whole community including the visually impaired. It would be unfair for visually impaired people if they were not able to use the same facilities just because the equipment didn't suit their needs. The Library has made a big effort to make sure all sections of the community are able to use the facilities available without feeling excluded and discriminated against. If the library didn't have this specialised equipment the visually impaired members would find that they make lots of mistakes when typing and this would put them off using the library again. Mouse There are two types of mouse, they are optical or roller ball. Mice can be wired or wireless. A mouse is an object that the user holds under one of the user's hands. ...read more.

Middle

forgotten to bring it with them they can borrow the external optical drive and buy a compact disk from the issue desk and save on to that. This means that members are still able to save there documents even if they don't own another storage device or haven't brought it with them. Members can request the external optical drive and use it to play music, CD's or DVD's. Memory pens Flash memory data storage device are also known Flash Drives, Memory Sticks, Pen Drives, and Memory Pens. Memory pens are more effective at transferring data than floppy disks or burning CD's. Storage capacities can range. The USB is usually protected by a removable cap. There is no external power required. Memory pens easily taken to any library and plugged in to the USB port, the documents can be opened at any computer they are plugged on to. Members of the library can use memory pens to save data on as they are unable to save on to the libraries computers hard drives. The library computers have two USB ports at the front of the computers to make it easy for the members to connect their memory pens. Random access memory RAM is the most common computer memory, it is used by programs to perform tasks while the computer is on. The data which is in the RAM will be lost when the computer power is switched off so it is important to save before switching off. Random access memory can improve performance, the more RAM in a computer the faster it will perform. There are several different types of RAM available for computers; these vary in cost and speed. The amount of RAM on the computers in the library is 512Mbyte memory . The library didn't need to buy extra RAM for their computers as the amount all ready on them was sufficient for general use and more than adequate for use in libraries where people use the computers for basic tasks such as word processing, surfing the internet and checking emails. ...read more.

Conclusion

Serial Port The serial port has been used on computers for years. Many of the newer systems have done away with the serial port completely in favour of USB connections; most modems still use the serial port, as do some printers and digital cameras. Few computers have more than two serial ports. Computer mice and even keyboards were used on serial ports. In the library USB ports have taken the place of Serial ports. All thought the computers in the library still have Serial ports they are considered to be older technology and are rarely used or needed in the library. They do however come as a standard part of the Dell computer which the library has purchased. Parallel port The parallel port is still commonly used for printers however USB is becoming more popular. A PC sends data to a printer or other device using a parallel port. The standard parallel port is capable of sending 50 to 100 kilobytes of data per second. Parallel ports are not used on the library computers as most devices are now connected using the faster USB connection. These ports come as standard on the computers which the library has bought. Ethernet port An Ethernet port is used to connect a computer to a network. In the library all computers are connected to the network using a CAT5-e cable with a RJ-45 connector. These are at the back of the computer and the members are not allowed to remove them. Fibre optic cable Fibre optic cables are made from two types of glass. Fibre optic cables are thinker than a human hair and are very flexible. These cables carry information using pulses of light. Fiber optic cables are very fast. The library uses optic fibres to connect their servers to the internet, the speed is very fast and there is no interference. Fibre optic cables are very expensive, but they give an excellent internet connection which in fast and reliable. ?? ?? ?? ?? Lawrence Breslin ...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. Computer Hardware, uses, advantages and disadvantages.

    Paint Free with Microsoft computers The main use of paint is that you can create drawing on the computer and you can also design stuff as well. You can draw pictures to you likings. The disadvantage of paint is that your drawing isn't accurate if you have a steady hand.

  2. An Introduction To Modern Storage Devices

    The cover would normally form an airtight seal around the hard disk drum. Hard disk drives began storing only a small amount of data, but now they are available to hold a huge amount of information, up to around 73 GB (Gigabytes)

  1. Designing a system for an IT user - He needs to have a good ...

    CDs and DVDs CDs and DVDs are used to store audio or video files which can be played in a compatible CD or DVD player. A single sided DVD can store about 4.7Gb of data. DVDs which store data on both sides can hold over 9Gb of data.

  2. Hardware Choices and Operating System.

    Compared to other picture editing programs it has basic editing capabilities. It will make pictures look better than it would on paint. It cheap. So you can get pictures without paying for it. It works with windows only. It works well with windows.

  1. Choosing hardware and input devices.

    It doesn't have wires which need connecting to the computer which also makes it easier to use. It uses battery so it can easily run out of energy. Handheld Scanner Flatbed Scanner It uses a light source, normally a cold cathode lamp to brighten the scanned imaged.

  2. Choosing the best harware for my system.

    If you use an old window then the speed would much slower and it would crash more often. If I used CLI then the computer would be faster but then it has no colour and when people do their work it puts them off and also if you make one

  1. I will describe the hardware I have used in my system, the way they ...

    You have to wait till the scanning finishes then you have to repeat it all over again. Keyboard The way I detected my errors is that I checked my work twice. The way I corrected my errors is that I clicked the underlined words and chose a suitable word from the list.

  2. Memory and Storage

    * It is not very fast to access the files because the read-write heads have to move to the correct parts of the disk and then read the data. * If the hard disk crashes the computer will not work.

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