Input and Output System
Input
System
System
An
input device is a peripheral or piece of computer hardware equipment, which is
used for providing data and controlling signals to an information processing
system (Computer).
input device is a peripheral or piece of computer hardware equipment, which is
used for providing data and controlling signals to an information processing
system (Computer).
TYPES OF INPUT DEVICES
1. Keyboard: It is human interface
device, which is represented as a layout of buttons. Each button or key could
be used to input linguistic character to a computer for particular functions.
device, which is represented as a layout of buttons. Each button or key could
be used to input linguistic character to a computer for particular functions.
2. Pointing Devices (Mouse
& Trackball): These are any human interface devices that allow users to input spatial
data to a computer. Eg: mouse, trackball, Glidepad.
& Trackball): These are any human interface devices that allow users to input spatial
data to a computer. Eg: mouse, trackball, Glidepad.
3. Game Devices: The motion of cursor is
controlled by joystick or arrow buttons (Game Pad)
controlled by joystick or arrow buttons (Game Pad)
4. Pen Input: It is especially used in
Personal Digital Assistant (PDA). It is used for Data input, Pointing Device,
and Command Gesture etc.
Personal Digital Assistant (PDA). It is used for Data input, Pointing Device,
and Command Gesture etc.
5. Touch Screen: The touchscreen enables the
selection by just touching the screen.
selection by just touching the screen.
6. Digitizers and Graphic
Tablet: The
Tablets have Special Command for the conversion of drawing and photos.
Tablet: The
Tablets have Special Command for the conversion of drawing and photos.
7. Page Scanner: It works like copy machine
and captures whole image for converting to the digital image.
and captures whole image for converting to the digital image.
8. Hand Scanner: It can move across document
or picture. It can capture only a section of a page or a large image.
or picture. It can capture only a section of a page or a large image.
9. Bar Codes: It is used at the retail
shops to track inventory and calculate the sale at the checkout counter.
shops to track inventory and calculate the sale at the checkout counter.
10. Optical Character: It uses letters or special
characters that are especially shaped t be easy for the machines to read.
characters that are especially shaped t be easy for the machines to read.
Output
System
System
An
Output System is computer hardware equipment, which is used to communicate the
result of data processing system.
Output System is computer hardware equipment, which is used to communicate the
result of data processing system.
TYPES OF OUTPUT DEVICES
1. Printer: A printer prints the
content on the monitor onto a paper. The speed of a printer could be measured
in character per second (cps), line per minute (lpm), and page per minute
(ppm). The quality of prints can be measured in DPI (Dot per Inch).
content on the monitor onto a paper. The speed of a printer could be measured
in character per second (cps), line per minute (lpm), and page per minute
(ppm). The quality of prints can be measured in DPI (Dot per Inch).
There are two types of
printer:
printer:
Impact Printer
Ø Dot Matrix Printer
Ø Daisy Wheel
Ø Chain & Band Printers
Non-Impact Printer
Ø Inkjet Printer
Ø Thermal Printer
Ø Laser Printers
2. Screen (Monitor): The Monitor is a screen on
which words, numbering, and graphic could be seen. The device that displays computer
output has various names comprising
which words, numbering, and graphic could be seen. The device that displays computer
output has various names comprising
Ø Screen
Ø Monitor
Ø Visual Display Terminal
Ø Cathode Ray Tube
Ø Visual Display Unit
Ø Liquid Crystal Display
SOME OTHER OUTPUT DEVICES
ARE AS FOLLOWS:
ARE AS FOLLOWS:
- Data projector
- Large Format Printers
- Microfilms
- Speaker
- Headphones
- Floppy Disk
- Computer Disk
