1. Input / Output device
by
Dr. I. Uma Maheswari,
Email id: iuma_maheswari@yahoo.co.in
2. Input / Output Devices:
Certain devices called peripherals obtain communication
to or from the computer.
Peripherals are the units connected to the central
processing unit. They are
input devices and
Output devices.
3. Input devices:
The purpose of having input devices is to present data to
the computer.
The input devices feed the data in machine -readable
to the computer.
Keyboard
Mouse
Disk
4. Output devices:
The output devices are used to bring out the
from the computer in a human-readable form.
Typical output devices are printers, plotters and
visual display unit.
Besides, storage devices like magnetic tape and
magnetic disks are also used to output the results.
5. Printers
Printers are the most common output devices used for
getting copy.
There are different types of printers depending upon
the mechanism, speed and quality of printing.
In certain printers some impression is made on the
printer ribbon making an impact on the paper. They
are called Impact Printers.
Printers, which do not have any impact on the paper,
are non-impact printers.
6. Impact Printers are classified into
Dot matrix printer
Letter quality printer and
Line printer
Non-Impact printers are classified into
Laser printer and
Ink Jet printer