• Monitors:
  

There are 2 kinds of screen used in monitor:
1. Cathode Ray Tube (CRT):
     Disadvantages:
a. High power consumption
b. Large in size
2. Flat Panel Display:
      2 kinds:
      1. Emissive Display:
           Converts electrical energy into light. Example: LED (Light Emitting Diodes)
      2. Non-Emissive Display:
           Converts light from some other sources into graphics pattern. Example: LCD (Liquid Crystal Device)

• Printers