Computer Basic Introduction
For beginners only
By Er. Ajay
Both are monitors
CRT Monitor
LCD / LED Monitor
LCD = Liquid Crystal Display
LED = Light Emitting Diode
CRT = Cathode Ray Tube
Extra Knowledge:
Organic light-emitting diode (OLED) monitors provide higher contrast, better
color reproduction and viewing angles than LCDs but they require more power.
A computer monitor is an output device that displays information in pictorial form. The
display device in modern monitors is typically a thin film transistor liquid crystal display
(TFT-LCD) with LED backlighting having replaced cold-cathode fluorescent lamp (CCFL)
backlighting. Previous monitors used a cathode ray tube (CRT).
This is a Desktop or full-size Computer Keyboard
Keyboards on laptops and notebook computers usually have a reduced
set of keys. They may not have a numeric keypad, and the function keys
may be placed in locations that differ from their placement on a
standard, full-sized keyboard. This is a laptop-size Computer Keyboard
Wired Keyboard
Wireless Keyboard
Wired Mouse
Wireless Mouse
OMR Scanner
OMR = Optical Mark Recognition Reader
Some Images of different types of scanner.
Scanner is a INPUT device.
Printers
Dot Matrix Printer
Dot matrix printing, sometimes called impact matrix printing
Daisy wheel

Computer basic introduction

  • 1.
    Computer Basic Introduction Forbeginners only By Er. Ajay
  • 2.
    Both are monitors CRTMonitor LCD / LED Monitor LCD = Liquid Crystal Display LED = Light Emitting Diode CRT = Cathode Ray Tube Extra Knowledge: Organic light-emitting diode (OLED) monitors provide higher contrast, better color reproduction and viewing angles than LCDs but they require more power. A computer monitor is an output device that displays information in pictorial form. The display device in modern monitors is typically a thin film transistor liquid crystal display (TFT-LCD) with LED backlighting having replaced cold-cathode fluorescent lamp (CCFL) backlighting. Previous monitors used a cathode ray tube (CRT).
  • 3.
    This is aDesktop or full-size Computer Keyboard Keyboards on laptops and notebook computers usually have a reduced set of keys. They may not have a numeric keypad, and the function keys may be placed in locations that differ from their placement on a standard, full-sized keyboard. This is a laptop-size Computer Keyboard
  • 4.
  • 5.
    OMR Scanner OMR =Optical Mark Recognition Reader Some Images of different types of scanner. Scanner is a INPUT device.
  • 6.
    Printers Dot Matrix Printer Dotmatrix printing, sometimes called impact matrix printing Daisy wheel