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).
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.
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)
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.
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.
the conversion of drawing and photos.
7. Page Scanner: It works like copy machine and
captures whole image for converting to the digital image.
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.
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.
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.
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).
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:
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
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:
FOLLOWS:
- 1. Data projector
- 2. Large Format Printers
- 3. Microfilms
- 4. Speaker
- 5. Headphones
- 6. Floppy Disk
- 7. Computer Disk
