I/o Device

I/o Device stands for Input and output. They are also called
peripheral device because they are surround CPU.
a. Input Device
These Devices are used to input data and program to the computer.
These are the parts of computer thorough which data or instructions
are given to computer for processing purpose. Some of popular input
device are listed below;
A. keyboard B. mouse C. joystick D. scanner E. light pen
F.Touchscreen
G. Digital camera H. touch pad I. Track ball J.
Digitizing Tablet
b. Output Devices
The output devices are the hardware's which accept result from
the primary memory and supply it to the users or store it to secondary
storage device for future use. They are mainly used for the output of
the processed information.
There are two types of output devices:
1. Soft copy output Device
2. Hard copy output Device
1. Soft copy output Device: The commonly used soft copy output
Device are monitor and panel display. The types of monitor are CRT
monitor and LCD monitor.
2. hard copy output Device :The commonly use hard copy output
Device are printer and plotters.
input dives The types of printer are
IMPACK Printer
NON Impact printer
Other classification of printer
Basally, there are 3 type of printer:
A. character printer
b. Line printer
c. page printer
A. character Printer
Character printers print only one character at a time. Daisy Wheel
Printer, Dot-matrix, and Ink-Jet Printer are the most commonly used
character printers.
B. line printers
Line printer is impact printers. They are used in computer systems
For producing high volume of paper output. Line printer can print from 300
To 2500 lines per minute. But, the limitation of printers is that they
cannot print graphics and can print only one font. Drum printer and
chain printers
Are the two most commonly used line printers.
c. Page printers
Page printer is very high speed non impact printers. They can
print at the speed of 20,000 lines per minutes. Laser printer is the
type of printer.
Plotters
The plotter is an output device that can create drawings, charts and
graphics. Some printers can also produce such graphics but plotters
are used when we requid a high quality drawing and graphics. some
common types of plotters are Drum plotters, flat bed plotters, Electro
static plotters etc.