Computer Hardware

Computer Hardware  

       

Definition of Computer Hardware

Computer Hardware can be defined as all the parts of the computer that are tangible.      
It can also be defined as the parts of the computer you can see, touch, or handle.      
Computer Hardware refers to the physical components of a computer system that perform the tasks of input, output, processing, and storage

Examples of Computer Hardware

       The following list represents a basic set of hardware found in most computers
  • Printer
    •        
  • Motherboard
    •          
  • Hard Disck Drive
    •          
  • Floppy Dick Drive
    •          
  • Compact Disk Drive
    •          
  • Digital Vidoe Disk
    •          
  • Monitor
    •          
  • Keyboard
    •          
  • Power Supply Circuit
  • Mouse, etc

    • Classification of Hardware

    Hardware can be classified into:
  • Input Unit
    •        
  • Output Unit
    •        
  • Storage or Memory Unit
    •        
  • Processing Unit

    • Input Unit

    The input unit helps the users to enter data and instructions into the computer. This unit receives data and instructions from the user and transfers them to the computer for processing.

    Examples of Input Devices

  • Keyboard
    •      
  • lightpen
    •      
  • Joystic
    •      
  • mouse
    •      
  • Microphone
    •      
  • Web camera
    •      
  • Stylus
    •      
  • Gamepad
    •      
  • Touch pad
  • Barcode reader

    • Output Unit

    The output unit communicates the results of the computer's data processing to the user. It converts the digital data processed by the computer into a human-understandable format.

    Examples of Output Devices

  • Monitor
  • Printer
  • Speakers
  • Projector
  • Plotter
  • Haptic Feedback Devices
  • Digital Photo Frame: Displays digital photos

    • Memory or Storage Unit

    The memory unit holds data and instructions for the computer.

    Examples of Storage Devices

  • Random Access Memory (RAM)
    •      
  • Read Only Memory (ROM)
    •      
  • Flash Drive
    •      
  • Hard Disk Drive
    •      
  • Compact Disk
    •      
  • Digital Versatile Disk (DVD)
    •      
  • Solid-State Drive (SSD)
    •      
  • Secure Digital card or SD card
  • Magnetic Tape

    • Processing Unit

    The processing unit is responsible for carrying out or executing instructions for computer programs.    

    Examples of Processing Devices

  • Central Processing Unit (CPU)
  • Graphics Processing Unit (GPU)

    • Network Unit

    This unit provides the infrastructure for multiple computer systems to communicate and share resources such as files, printers, and Internet access.    

    Examples of Network Devices

  • Modem
    •      
  • Routers
    •      
  • Hubs
    •      
  • Switches
    •      
  • Network Interface Card (NIC)
    •      
  • Load Balancers
    •      
  • Network Attached Storage (NAS)

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