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Computer Hardware (Classification (Input Devices (Joystick (Includes…

- - - - Allows the user to enter letters, numbers and special symbols into the computer
      - Main input device to communicate with the computer
    - - Includes buttons called triggers
      - Mainly used for computer games
      - A pointing device with a vertical lever mounted on a base
    - - Hand-held device used to control the movement of the cursor
      - Two or three buttons that allow the computer user to make selection in the menu, draw graphics or open files
    - - Captures images from photographs, magazines, books etc.
      - Stores them in the computer in a digital form
      - Images can be edited, displayed on the screen or inserted in the documents
    - - Changes audio signals into electronic signals which are translated into digital form by the sound card
      - Allows the user to input audio into computer
    - - Information is used by the computer to print bill for the customer
      - Reads the bar code printed on products that represents product code, description and price
    - - Used to capture pictures and store them in a digital form
      - Can be downloaded to computer for editing, viewing or inserting in documents
    - - Pressure sensitive display screen
      - Used to interact with the computer by touching the pictures or words with fingers
    - - in the form of a light-sensitive wand used in conjunction with a computer's cathode-ray tube (CRT) display.
      - It allows the user to point to displayed objects or draw on the screen in a similar way to a touchscreen but with greater positional accuracy.
    - - It is an input device on laptops and some keyboards to move a cursor with finger
      - The cursor moves in the same direction as the user's finger does
  - - - A magnetic storage device used to store computer data
      - Fixed inside the computer casing
      - Storage capacity of hundreds of gigabytes
    - - Has more storage capacity then the CD
      - installed in the computer to read data from or write data to a DVD
    - - A small storage device having storage capacity of few gigabytes
      - Available in different sizes
  - - - High speed memory installed on the motherboard
      - Information can be read from or written into it
    - - A very small amount of extremely fast memory
      - Faster and more expensive than RAM
    - - A single IC chip installed on the motherboard
  - - - Small memory units in the microprocessor
      - Temporarily store some information during the execution of the program
      - Some common registers are Cash registers, Instruction register etc
    - - Performs all the calculations and comparisons
      - Arithmetic unit performs operations like Addition, subtraction, multiplication and division and logical unit performs logical operations which include comparisons of numbers or alphabets
    - - Controls all the activities on the computer
      - It is the main chip on the motherboard
    - - Contains microprocessor, main memory, expansion cards, many IC chips, connectors and other electronic components
      - It is the main circuit board inside the system unit and all the input and output devices are connected to the motherboard
    - - Loads programs into memory and executes them
      - Consists of very complicated circuits and Controls the operations of all the operations of the computer