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

A computer system can be represented in either a logical or physical form. Both useful are in understanding computer system theory.

Extracts from this document...


Logical Representation Vs Physical System * A computer system can be represented in either a logical or physical form. * Both useful are in understanding computer system theory. Physical * The actual hardware as seen in the real life * Contains micro-electrons & physical mechanisms * Power by electricity * Very detailed & complex * Difficult to fully understand without a working knowledge of electronics Logical * A basic model of computer system * The model is built from a number of different blocks * Each block performs a different task * All blocks work together to process data into information * Model is conceptual Input Output Mouse Printer Keyboard Monitor Microphone Speakers Scanner Camera Input Device � An input device is a device which lets the user feeds data into the computer � It converts data into a ...read more.


� Stores processed data before it is output � Contents are filled by input devices, backing storage or the CPU � Data that needs to be saved is written to the backing storage. Backing Storage � The backing storage is usually non- temporary, although its contents may be deleted � It has loads previously stored data into the main memory � It has loads previously written programs into memory for processing by CPU � In the real world may be internal or external � It is usually mechanical (e.g. Hard Drive, CD or DVD Writer) which slows a computer system � Data is usually read/loaded or written/saved CPU � CPU stands for Central Processing Unit � The CPU is also known as the Processor � The CPU is like computer's brain � The speed of the CPU depends on the efficiency/ power of the computer system � The CPU consists of two sub-systems: The ALU (Arithmetic Logic Unit) ...read more.


Four essential main pieces of hardware * CPU * RAM * Motherboard * Hard Drive The essential software is the operating system. Before can occur on a computer is input needs to take place from keyboard or mouse. To open word a message is sent to the operating system because that controls the hardware. When a program loads it has to come from somewhere this is a program called interrupts. When the CPU receives the interrupt it stops what it's doing and starts another process. The os asks the CPU system, CPU asks what wants to do, sends message get program word. Os needs to get from the hard drive. Then the os asks the CPU asks ram is there any space in the ram to run this program. Os yes or no, this point is where the CPU & HD & RAM are ready. Word is displayed on the screen. ...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 ICT Systems and Application 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 ICT Systems and Application essays

  1. Creating a computer system for a video rental shop

    However if I were to document the complete production of the system I would have used the systems life cycle. The systems life cycle helps designers to approach the design of a system in a methodical way. There are several variations of the cycle but below is the most common.

  2. Introduction to information skills and system. An information system is a system that accepts ...

    Terminals, input/output, process, database, decision, flow line. Decision trees show all possible decisions and their results. External specification - the appearance of new system Internal specifications - providing technical support to build the system, identify process required by new system, specifications for input data. Information technology - application software may be available e.g.

  1. Ict Unit 2b

    Networked computers usually print to a printer through the network card. The most crucial printer measurement is its dots per inch rating. Printers are used in hospitals to print out important information or documents. Like the patient's results and other important papers, so the information in kept safe and can be shown to other people easily e.g.

  2. In this (2b) report I am going to investigate software application, Input and Output ...

    Traditional keyboards use spring-based buttons, though newer variations employ virtual keys; Even projected keyboards. Sainsbury uses an overlay keyboard that is a specialized keyboard with no pre-set keys. Sainsbury often used overlay keyboards as a quick and easy way to input items and devices with just one button.

  1. Hospital Information System

    in decision making process, doctors with experience of more than one year, and the patients willing to participate in the study. The tool used to collect the data was a structured, closed ended questionnaire. The questionnaire was constructed with emphasis on the content, clarity and simple language.

  2. Billing System

    The Management of the VEEYEN MILLS prefers a computerized system, so that they can easily change and alter their accounts each time a new levy is introduced or when the price of goods increase. They prefer to have Billing systems computerized since it would be much easier for them to have accounting/balancing etc.

  1. Create a power point presentation for people who dont understand cricket so I can ...

    because the audience would need to understand the signals if they plan to watch cricket in the future 11 Rules: Bowling styles The explanation of the styles I want the audience to know how a bowler can bowl 12 Rules: Batsman's shots The 10 usually played shots by batsmen The

  2. ICT car insurance quotation System Coursework

    it would need maintaining to keep the system in the best working order; this can be done by a ICT technician or any other computer skilled personnel from the dealers. Professionalism within the dealers! Answer: The dealers like to portray a professional reliable, quality appearance to its customers, so the

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