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Basic Computer Concepts

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The Computer System Components

The Computer System Components

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Basic Computer Concepts Basic Computer Concepts Presentation Transcript

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  • It is the case that holds the motherboard, CPU, power supply, hard drive, memory, disk drives and expansion cards that are plugged into the motherboard.
  • A collection of components designed to process and store data. It comprises at least one input device, a processing unit, an output device, and a storage device, and may contain a communications device.
  • It is the main circuit board with electronic circuitry to which all the other PC components are plugged or connected, serving as centralised control and as a hub for the flow of information.
  • It also called the PROCESSOR or popularly known as CPU (Central Processing Unit). It is the brain or intelligence of a Computer System.
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  • Written programs, commands or instructions that tells the computer to do things.
      • System Software
      • Application Software
    • System Software
    programs designed to operate the computer hardware and to provide and maintain a platform for running application software.
    • Application Software
    programs designed for a specific purpose like word processor, spreadsheet, media players and database applications.
  • Physical component of the computer system. These are the tangible parts or the parts that can be touched.
    • Input
    • Processing
    • Output
    • Storage
    • Communication
  • Process data to form an information
      • Input
    Provides data to the computer.
      • Processing
    Presents data/info acceptable to the user.
      • Output
  • Preserves data/info for retrieval.
      • Storage
    T ransmit data/info to other computers globally.
      • Communication
    • Keyboard
    Used to type in information to a computer system.
    • Mouse
    Used to control an on-screen pointer.
    • Joystick
    Used mostly for playing games. The stem can be moved omni-directionally to control the movement of an object on the screen.
    • Trackball
    A mouse on its back it consists of a ball resting on two rollers at right angles to each other, which translate the ball's motion into vertical and horizontal movement on the screen.
    • Graphics Tablet
    A flat plastic rectangle with subsurface electronics, used in conjunction with pointing devices, PUCK ,a mouse-like device with buttons for selecting items or choosing commands and STYLUS , a pen for drawing or pointing.
    • Drum Scanner
    A high-quality image-capture device. The image to be captured is wrapped around a drum that spins very fast while a light source scans across it to capture a digital version of the image.
    • Flatbed Scanner
    This scanner type has a flat plane of glass where the item being scanned is placed. The scanning head moves along a track on the underside of the glass to capture an image of the item on the glass.
    • Sheet-fed Scanner
    A scanner that allows only paper to be scanned rather than books or other thick objects. It moves the paper across a stationary scan head.
    • Handheld Scanner
    A scanner with a handle and typically a trigger button for switching on the light source.
    • Microphone
    Allows the computer to receive and record sound. Necessary for voice recognition software and any software that need to record sound.
    • Digital Camera
    Takes pictures without film and stores your snapshots as digital files in its memory or on a disk.
    • WebCam
    Takes pictures without film and stores your snapshots as digital files in its memory or on a disk.
    • Processor
    The “brain” or intelligence of a Computer System. It performs the systems calculating and processing.
    • Monitor
    Displays characters and graphics on a television-like screen. CRT Monitor LCD Monitor TOUCH-SCREEN Monitor
    • Printer
    a peripheral which produces a hard copy (permanent readable text and/or graphics) of documents. DOT-MATRIX INKJET LASERJET PLOTTER
    • Speaker
    A device that converts analog audio signals into the equivalent air vibrations in order to make audible sound.
    • Digital Projector
    A device that connects to a computer via cabling to enable the computer monitor display to be enlarged and projected onto a screen.
    • Hard Disk
    Located within the system unit but are external to the main circuit board. These devices store data as charges on a magnetically sensitive medium or on a disk coated with a fine layer of metallic particles.
    • Flash Disk
    consists of flash memory data storage device integrated with a USB (Universal Serial Bus) 1.1 or 2.0 interface. USB flash drives are typically removable and rewritable most weigh less than 30 g (1 oz)
    • CD/DVD
    Uses optical laser technology to store data into the disk.
    • Network HUB
    is a device that connects multiple computers into a network.
    • Modem
    A digital-to-analogue device that links computers to the telephone network. A modem enables digital data to be modulated so that it is compatible with the analogue signals carried by the telephone system.
    • Router
    An electronic device that is used to forward data between computer networks.
    • Network Cable
    are used to connect one network device to other or to connect two or more computers to share printer, scanner etc. Different types of network cables like Coaxial cable, Optical fiber cable, Twisted pair cables are used depending on the network's topology, protocol and size. 
    • NIC/Lan Card
    is a computer system hardware component designed to allow computers to communicate over a computer network.