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

A computer system consists of hardware and software.

Extracts from this document...

Introduction

A computer system consists of hardware and software. Hardware is the equipment, which makes up the computer system. Hardware consists of: - Input devices such as keyboard, mouse, joystick - The Central Processing Unit (CPU) - Output devices such as a printer, monitor, graph plotter - Backing storage devices such as disc drive, hard drive - Media such as discs, tapes, paper etc There is hardware that I used is: * Mouse * Keyboard * Printer * Monitor * A tracker ball mouse A tracker ball mouse is an input device and similar to a mouse but the ball is set into a cup on the top of the unit. A finger or, on larger tracker balls the palm of the hand, is used to roll the ball in any direction. The ball controls the movement of the pointer on the screen. Buttons on the tracker ball work in the same way as mouse butons to activate processes on the screen. My alternative of using a mouse with a tracker ball would be a mouse without a tracker ball. Benefit: * A tracker ball does not require a large flat surface. Drawbacks: * Most people find them a bit fiddly * Not accurate * Not quiet ALTERNATIVE: Mouse without a tracker ball The pointer on the monitor screen mirrors the movement of the mouse by the user's hand. ...read more.

Middle

Inkjet printer For printing my coursework the printer, which was used was an ink-jet printer. In an ink-jet printer, the print head contains tiny nozzles through which ink can be selectively sprayed onto the paper to form characters or the graphic images. Inside the print head are tiny piezoelectric crystals. These crystals change shape when an electric current is applied across them and this forces the ink out through the print head nozzle. My alternative would be a laser or dot matrix printer. Benefits: * They are quite good * Good quality output is produced * There is little extra cost for colour printing. Drawbacks: * A good quality paper is needed or the ink spreads. * The ink can be smudged. ALTERNATIVE: Dot-matrix printer A dot-matrix printer has a print head that travels across the paper. In the head are sets of pins, which shoot out, and strike the ink ribbon against the paper as the print head moves along. These printers produce low to medium quality black and white printing. Several years ago they were the ideal choice for a home printer but now the colour ink-jet has taken their place. They are still used in business for the following reasons: Benefits: * The running costs are very low. ...read more.

Conclusion

* A formula allows calculations to be done on other cells. * Formulae and other data can be copied into groups of cells. * A variety of operations can be carried out on rows or columns. APPLICATIONS: of a spreadsheet * Displaying and calculating accounts and other financial information. * Performing calculations on data collected in experiments and surveys. * Performing calculations of data from which graphs can be drawn, e.g. * Calculating the average temperature for a graph of weather data. * A graph to solve a mathematical equation. Example software: Microsoft Excel This spreadsheet program is ideal for working out all of my costs. Its mathematical capabilities are very useful for this type of task. Advantages: * It has the option of typing formulae into the cells. These formulae will perform mathematical calculations that are quicker and easier than working it out in your head. * The formulae in the cells work with each other and with the cells, so if you change a cell or a formula, the other cells with formulae in them will change to compensate. * It can produce graphs with one click of the mouse. * It has a layout that is easy to use and to see. * It can be used to make simple tables. Disadvantages: * I can't think of any, this program has no faults. My alternative program would have been Lotus 123 but this program is not available to me. ...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)

    800 dpi Optical Mouse * Multimedia Hotkeys * Reliable and Spill Resistant £17.50 Intel Q6600 Processor Core 2 Quad Intel Core 2 Quad Q6600 Socket 775 Processor dell 20 inch tft monitor £499.99 With four execution cores, the Intel Core 2 Quad processor blows through processor-intensive tasks in demanding multitasking environments and makes the most of highly threaded applications.

  2. Choosing hardware and input devices.

    It can work on nearly every surface because of the laser at the bottom. It cost much more than a mechanical mouse. The difference it will make is that I will not have to purchase any type of surface because it works on most surfaces but I won't be able

  1. Free essay

    Unit 3 Course Work

    If a piece of code in the file matches any virus identified in the dictionary, then the antivirus software can take one of the following actions: * Attempt to repair the file by removing the virus itself from the file; quarantine the file (such that the file remains inaccessible to other programs and its virus can no longer spread)

  2. ICT Coursework Report: Spreadsheet System

    Introduce new appropriate hardware and software. Analyse: Continuing assessing my project, I conducted a feasibility study on the Mr Smith's problem and soon composed a long systems analysis to tackle this hard problem. The hardware and software that was introduced was used to enhance the accuracy of the business of Mr Smith.

  1. Hardware Choices and Operating System.

    A TFT monitor has a limited angle view. If you are working and looking directly at your computer then this is fine, but if others are trying to read from the side then this will prove to be difficult. 4GB HP C485W USB Flash Drive. £8.99 This is an input storage device.

  2. Choosing the best harware for my system.

    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.

  1. Task 1 - Hardware and Software

    speed, and smaller memory. Celeron prices, however, are well cheaper at around £60. 3. Centrino is a less powerful chip that allows longer battery life. Cost: £250 to £390 pounds. 4. Xeon. Plugs into a socket with around 600 pins.

  2. Different printers.

    Dot matrix printers are quite cheap to buy, because they were the first types of printer to be invented. When the ink ribbon needs changing, they are cheap to purchase, making them cheap to run. These printers also allow you to make a carbon copy.

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