This document discusses different types of computer input and output devices. It describes keyboards, mice, scanners, and digital cameras as common input devices. Keyboards allow data entry by pressing keys and come in standard, multimedia, and wireless varieties. Mice are pointing devices that can be clicked and include serial, PS/2, optical, and wireless types. Scanners input documents and include MICR, OMR, and OCR varieties. Digital cameras input images. Output devices discussed include monitors, printers, and projectors. Monitors display soft copy output as CRT or LCD. Printers provide hard copy output as dot matrix, inkjet, or laser printers. Projectors display large screen presentations.

1. Group :3
Batch :34/E
Roll :1702,1674,1688
Date :24-3-2017
WORLD UNIVERSITY OF BANGLADESH

2. Flow of presentation
 Introduction
 Types of peripherals devices .

3. Introduction

5. Types of Input device
 Keyboard
 Mouse
 Scanner
 Digital camera

6. Keyboard
 Keyboard is the most commonly used input devices.
 They allow data entry into a computer system by pressing a set of keys
neatly mounted on a keyboard
 Contains some extra command keys and function keys that affect the
operation of computer or keyboard itself
 Types of keyboard:
(1).Standard keyboard
(2).Multimedia keyboard
(3).Wireless keyboard

7. Mouse
 Mouse is the most popular point and draw device
 It is a must have input device on modern personal computers
 Has 2 or 3 buttons and can be clicked or double-clicked to perform tasks
 Optical mouse doesn’t have a ball but uses a laser to sense the motion
 Types of mouse:
(1).Serial mouse
(2).Ps/2 mouse
(3).Optical mouse
(4)Wireless mouse

8. Scanner
 Data scanning devices are input devices used for direct data entry into a computer system from source
documents
 Common scanner devices are:
(1)Magnetic Ink character Recognition(MICR)
Reader:-used by banks to process large volumes of cheques and drafts
(2).Optical Mark Reader (OMR) scanner:-scanning the answer sheet of an objective
type test in which answer are marked by darkening a square or circle space by pencil
(3).Optical character Recognition (OCR) scanner:-used for direct reading of any printed
character

9. DIGITAL CAMERA
 A computer with a vision input device consists of
digital camera
 The camera creates an image of the objects in digital
form so that It can stored and interpreted by the
computer
 The digital image of the object is matched against
similarly formed pre-stored images in the computer’s
image database

10. Types of output device:
 Monitor
 Printer
 Projector

11. Figure of some output devices…

12. Monitor
 Monitor are the most popular output device used today for producing soft copy output
 A monitor is associated usually with a keyboard and together they form a video display
terminal
 Two basic types of monitor:-
(1).Cathode Ray Tube(CRT):-The CRT monitor displays images with color that are consistent and
can be viewed with different angles
(2).Liquid Crystal Display (LCD):-The LCD monitor are thin and they use little space. They are
light in weight, consume less energy.

13. Printer
 The printer is a device that print text document and image on paper
 There are different types of printers:-
(1) .Dot-matrix:-Dot matrix printers are character printer that print one character at a time. They
form character and all kind of images as patterns of dots.
(2). Inkjet:-Inkjet printers are character printers that form characters and all kinds of images by
spraying small drops of ink on a paper .
(3) . Laser printer:- The laser printer uses a beam of laser for the purpose of printing and it is
consists of a revolving cylinder that is made up of photoconductive material

14. Projector:
 Screen image projector is an output device used to project information from a computer on a
large screen
 Additionally, a full-fledged multimedia presentation with audio, video, image and animation
can be prepared and made by using this facility
 Like monitor, screen image projectors provide a temporary , soft- copy output

15. Thank you
Thank you for your patience and understanding our presentation.