INPUT AND OUTPUT
DEVICES
Prepare for your exams
Study with the several resources on Docsity
Earn points to download
Earn points by helping other students or get them with a premium plan
Guidelines and tips
Prepare for your exams
Study with the several resources on Docsity
Earn points to download
Earn points by helping other students or get them with a premium plan
Input and Output Devices in Computing: Keyboards, Mice, Monitors, Printers, and More, Assignments of Computer science
An overview of various input and output devices used in computing systems. It covers keyboards, mice, light pens, barcode readers, magnetic ink character recognition (MICR), monitors, printers, and plotters. the functions, features, and differences between these devices, as well as their applications in text and graphic output.
Typology: Assignments
2020/2021
1 / 19
This page cannot be seen from the preview
Don't miss anything!
Related documents
Partial preview of the text
Download Input and Output Devices in Computing: Keyboards, Mice, Monitors, Printers, and More and more Assignments Computer science in PDF only on Docsity!
INPUT AND OUTPUT
DEVICES
INPUT DEVICES
๏ KEY BOARD
๏ MOUSE
๏ LIGHT PEN
๏ BARCODE READER
๏ MAGNETIC INK CHARACTER
RECOGNITION (MICR)
MOUSE
Use to point and select an option
on the monitor
Mouse may have 2 or 3 buttons.
Two Types
Mechanical Mouse โ uses ball
Optical Mouse โ uses led
LIGHT PEN :
It is a pointing device that can be
used to select an option by simply
pointing at it ,or drawing figures
directly on the screen.
A light pen has a photo-detector
at its tip.
Used for drawing graphics in
MICR
Recognizes the character
by scanning them
Special ink prints these
characters
Area used is bank
OUTPUT DEVICES
MONITOR
PRINTER
PLOTTER
Each character is formed by a
no of tiny lightened dots called
pixels
The no of dots per unit area is
called resolution.
VDU screen can display 24 lines
each line can have 80 characters.
PRINTER
Use to obtain output on paper.
Two categories
IMPACT & NONIMPACT
IMPACT PRINTERS
In this type pressing a type face against
an inked ribbon which makes a mark
on the paper prints characters.
Ex โ DOT MATRIX PRINTER(DMP)
NON IMPACT PRINTERS
No contact between the type face
and the paper while printing
Ex : Laser printer & Inkjet
printer
INKJET Printer
Use heat & jets of ink to print
characters
LASER PRINTER
Uses a light beam to form images
on the paper using toner ink as
medium.
It produce very high quality output
for both text and graphics.Used in
publishing.
Expensive.
SPEED
Measured in terms of
Characters per second.(CPS)
Lines per second(LPS).
Pages per Minute (PPM)
DOT MATRIX โ 200CPS TO 540
CPS
LASER โ 4 โ 20 PPM