Department Of Computer Science Information Technology

Presented To Respected Sir Imdad Ullah

Presented By Nosheen Shoukat BS-IT-41 Muhammad Tayab BS-IT-49 Ramsha Mukhtar BS-IT-36 Meha Shahid BS-IT-16 Haroon Saeed BS-IT-21 Izhar Ahmad BS-IT-33 Naeem Sheikh BS-IT-18

INPUT Data or instruction given to computer by user. Signals received by computer before processing Signals received by computer before processing  Audio input  Video input

Input Devices Devices used to enter data into computer Devices which help computer to receive data by user before processing Examples: Examples:  Keyboard  Mouse  Joy sticks  Digital camera

Keyboard Most commonly used input device Buttons are called keys Examples:  QWERTY Keyboard  Enhanced Keyboard  Cordless keyboard  Portable Keyboard

Mouse Small and lightweight Small and lightweight It has only two or three buttons It has only two or three buttonsExamples:  Mechanical mouse  Optical mouse  Wireless/cordless mouse

Joy Stick It consists of base and stick Base consists of buttons to perform tasks Stick used to control the cursor

Digital Camera Used to store image Used to store image Allows user to edit image Allows user to edit image

Types of camera Studio Camera Studio Camera Field Camera Field Camera Point-and-shoot Camera Point-and-shoot Camera

Pen Input It look like small tiny ink pen It look like small tiny ink pen Uses pressure instead of ink Uses pressure instead of ink Digital Pen, Stylus Digital Pen, Stylus

Touch Screen Touch sensitive Device Touch sensitive Device It works by touching the area of screen It works by touching the area of screen

OUTPUT Information received by user from computer Information received by user from computer Signals which user gets after processing Signals which user gets after processing  Soft copy output (shown on screen)  Hard copy output (printed on paper)

Output Devices Devices used to display information to the user Devices that help user to receive information by computer after processing  Monitor  Printer  Speakers  Projector

Printer A printer prints characters, symbols and graphics on papers A printer prints characters, symbols and graphics on papers Used in business to print documents Used in business to print documents Printed output is called hard copy Printed output is called hard copy

Types Of Printers Types Of Printers Impact Printers Impact Printers Non-impact printers Non-impact printers

Types Of Impact Printer Dot matrix Printers Dot matrix Printers Line Printers Line Printers Daisy wheel Printers Daisy wheel Printers

Dot matrix Printer It is impact printer Produces printed images when tiny pins strike inked ribbon It uses 100 to 150 DPI 200 to 300 character per minute

Line Printer Fast impact printer Fast impact printer Its speed measured in line per minute (some printer print 3000 line per minute) Its speed measured in line per minute (some printer print 3000 line per minute)Types Band printer Chain printer

Daisy Wheel Printer Similar to typewriter Similar to typewriter Uses print wheel called daisy wheel Uses print wheel called daisy wheel

Types Of Non-Impact Printer Inkjet Printers Inkjet Printers Laser Printers Laser Printers Photo Printers Photo Printers

Inkjet Printer It prints by spraying tiny drops of liquid ink on paper It prints by spraying tiny drops of liquid ink on paper It can print 1 to 6 pages per minute It can print 1 to 6 pages per minute It is inexpensive It is inexpensive

Laser Printer It creates images on paper by laser beam It creates images on paper by laser beam LASER stands for Light Amplification Emission Of Radiation LASER stands for Light Amplification Emission Of Radiation Density of these dot ranges from 300 to 2000 dots per inch Density of these dot ranges from 300 to 2000 dots per inch It is also called Page Printer It is also called Page Printer

Photo Printers It is color printer Also called Snapshot printer Specially designed to print high quality photographs Some photo printers have built-in LCD color screen

Monitor Most commonly used output device Output on monitor is called soft copy

Speakers Produces audio output Speakers produce music, speech or other sound like beep

Projectors It projects the output of computer screen on a larger screen It is used to deliver lecture to many students in class

Thanks