Computer Hardware

Computer Hardware

1. Input Unit

   • Keyboard
   • Mouse
   • Trackball
   • Touchpad
   • Image Scanner
   • OMR
   • OCR
   • MICR
   • Light Pen
   • Digital camera
   • Microphone
   • Pen Computing
   • Graphics Tablet
   • Webcam
   • Barcode Reader
   • Fingerprint Scanner
   • Gamepad
   • Wii Remote
   • Wired Glove

2. CPU

   • Arithmetic Logic unit
     • Accumulator
     • Shift Register
     • Data Register
   • Control Unit
     • Program Counter
     • Instruction Register
     • Memory Address Register

3. Main Memory

   • Random Access Memory
     • Used for temporary storage of programs and data used by the CPU
   • Read Only Memory
     • Used for permanent storage of low level programs needed to power up a PC.

4. Secondary Storage

   • Magentic
     • Magnetic Tape
     • Hard Disk
     • Floppy Disk
   • Optical
     • CD-ROM
     • CD-R
     • CD-RW
     • DVD-ROM
     • DVD-R
     • DVD-RW
   • Electronic
     • USB Memory
     • Flash Memory

5. Output Unit

   • VDU
   • Sound
   • Printer
   • Plotter