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

Computing Introduction

Extracts from this document...


Computing Introduction What is a computer system? A computer system is made up of hardware, which are the physical constituents of a computer (e.g. monitor), and software, which are the programs that give the computer instruction, i.e. tell it what to do (e.g. an Operating System). There are five main components of a computer system. These can be shown by using the diagram below. It can be seen above that a computer system processes the raw data, which is entered via input peripherals (such as a keyboard), into useful information. Via output devices (such as printers), this information is then output, as a visible result or one which can be heard (i.e. sound), due to the work of data processing, which is carried out by the central processing unit (CPU). The processor is vital to the system with its three functions of controlling the transmission of data from input devices to memory, processing the data held in the memory and then controlling the transmission of information from main memory to output devices. ...read more.


Types of Computer There are seven main types of computer: Supercomputers These are the fastest and most expensive modern computer systems. They are usually not used in normal data processing, but for performing millions of intense mathematical calculations at the same time. For this reason, supercomputers have multiple processors. They are usually half the size of a classroom and cost around �5-7 million pounds. An example of how a supercomputer might be used is to forecast the weather and also it is used in NASA. This picture shows the Cray T932 series. It is capable of 56 billion calculations per second, which is matched by its price of �10,000,000. Mainframes These are very large computer systems, which usually have multiple processors or one very powerful single processor. There is typically a vast amount of memory, with many communication lines as well. Mainframes are often used as servers on the internet. They are also used in large businesses, such as Barclays, in order to host the very large database needed by the company. ...read more.


Games can even be played on these small machines. They are usually used by people who want something which can go around with them wherever they go. It is typical of a working person to have one of these. Embedded Computers Embedded computers are computer systems that are within a device and have a single dedicated job. The functions of these devices cannot be altered by the user as they are programmed by the manufacturer permanently in to the microprocessor. Embedded systems are found everywhere. For example a system controlling the temperature in a greenhouse, the working of a washing machine, dish washer, microwave and many more devices such as the digital watch. Hardware Devices INPUT STORAGE OUTPUT Keyboard ROM Monitor (VDU) Mouse RAM Printer (laser, ink-jet, dot matrix) Concept Keyboard Hard Disk Plotter Joystick Floppy Disk Speaker Tracker Ball CD-ROM Motor Touch Sensitive Pad CD-R Buzzer Light Pen CD-RW Actuator Touch Sensitive Pad Magnetic Tape Robots Graphics Digitiser DVD Light Emitting Diode (LED) Video Digitiser Zip Disk Liquid Crystal Display (LCD) Scanner Head-Mounted Display (HMD) Digital Camera Bar Code Reader Optical Mark Reader (OMR) Optical Character Reader (OCR) Magnetic Ink Character Reader (MICR) Magnetic Reader Sensor Microphone Computing Introduction Preeyesh Bhadresha ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Information Systems and Communication 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 AS and A Level Information Systems and Communication essays

  1. Marked by a teacher

    Database Coursework on a Vehicle Rental System: Analysis

    5 star(s)

    customers, and manufacturers are continuously changing due to a multitude of factors. As such, it is very important that the business keeps track of these changes and amends existing data structures and records as appropriate. There are many instances in which details held by the system will have to be amended.

  2. Cunha & Ribeiro Ltd: Stock Control & Invoice Database

    The problem is that because he has plenty of paperwork around the office he sometimes loses important documents as he has to store documents in folders which sometimes get placed in the incorrect folders. Also, since he has deliveries to make he tends to forget when deliveries are made and

  1. Database Coursework on a Rental System: Design

    Entity Relationship Modelling: - Relationships between entities will be created using Access's relationship function. There are various degrees of entity relationships that can be designated; One-to-one, one-to-many and many-to-many. In one-to-one entity relationships, for every instance that one of the entities in the relationship occurs once, the other entity occurs once as well.

  2. Role of different departments at Bedrooms4U, personnel involved. Main processes carried out by Bedrooms4U,inputs, ...

    Information passed between suppliers: -Bed roms 4U would send information to the suppliers about the quantity needed, type of product, the size of the bedroom, the colour and the make of the product, Also whether in stock or not. [3] Main processes carried out by Bedrooms4U,inputs, the processing and calculations, and the outputs involved.

  1. Custom Load Trucking

    While the programmer develops the program the lorries can have their GPS tracking devices fitted inside. The proposed computer system will have to be bought and installed and fully operational for the program to run on. Once the machine is up and running and the program is developed the staff

  2. Guide for Input Devices

    This is the cheapest and most common type. It is also the most troublesome because the mechanical parts get clogged with dust, lint, and hair, and they also break. They usually need mouse pads, or at least table or desktops of a certain texture to work well. Optical mice use a reflected red LED light to detect movement.

  1. Unit 14 - School of Computing

    I will also have to use Microsoft Word to design the website before I can make it, I will have test the website as well, so I will have to use Microsoft as well. * Desired extent of online operations - I will be advertising the curries that we sell

  2. Communication & Employability Skills for IT. OCR Cambridge Technicals Unit 1 LO1-P1

    This includes books, CDs, videos or computer programs. A person who buys any of these does not give them the right to make copies, to play or to show them in public especially for financial purposes and personal gains. The right to do this only belongs to the copyright owner.

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