Department Of Computer Department Of Computer ScienceScience

Information TechnologyInformation Technology

Presented Presented ToTo

Respected Sir Imdad UllahRespected Sir Imdad Ullah

Presented Presented ByBy

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

INPUTINPUT

Data or instruction given to Data or instruction given to computer by user.computer by user.

Signals received by computer Signals received by computer before processingbefore processing

Audio inputAudio inputVideo inputVideo input

Input DevicesInput Devices

Devices used to enter data into computerDevices used to enter data into computerDevices which help computer to receive Devices which help computer to receive

data by user before processingdata by user before processing Examples:Examples: KeyboardKeyboard MouseMouse Joy sticksJoy sticks Digital cameraDigital camera

KeyboardKeyboard

Most commonly used Most commonly used input deviceinput device

Buttons are called Buttons are called keyskeys

Examples:Examples: QWERTY KeyboardQWERTY Keyboard Enhanced Enhanced

KeyboardKeyboard Cordless keyboardCordless keyboard Portable KeyboardPortable Keyboard

MouseMouse

Small and Small and lightweightlightweight

It has only two or It has only two or three buttonsthree buttons

Examples:Examples: Mechanical mouseMechanical mouse Optical mouseOptical mouse Wireless/cordless Wireless/cordless

mousemouse

Joy StickJoy Stick

It consists of base and stickIt consists of base and stick

Base consists of buttons to perform Base consists of buttons to perform taskstasks

Stick used to control the cursorStick used to control the cursor

Digital Camera Digital Camera

Used to store Used to store imageimage

Allows user to edit Allows user to edit imageimage

Types of cameraTypes of camera

Studio CameraStudio Camera Field CameraField Camera Point-and-shoot CameraPoint-and-shoot Camera

Pen InputPen Input

It look like small tiny ink penIt look like small tiny ink pen Uses pressure instead of inkUses pressure instead of ink Digital Pen, StylusDigital Pen, Stylus

Touch ScreenTouch Screen

Touch sensitive DeviceTouch sensitive Device It works by touching the area of It works by touching the area of

screenscreen

OUTPUTOUTPUT

Information received by user from Information received by user from computercomputer

Signals which user gets after Signals which user gets after processingprocessing

Soft copy output (shown on screen)Soft copy output (shown on screen) Hard copy output (printed on paper)Hard copy output (printed on paper)

Output DevicesOutput Devices

Devices used to display informationDevices used to display information

to the userto the user

Devices that help user to receive Devices that help user to receive information by computer after processinginformation by computer after processing

MonitorMonitor PrinterPrinter SpeakersSpeakers ProjectorProjector

PrinterPrinter

A printer prints A printer prints characters, characters, symbols and symbols and graphics on papersgraphics on papers

Used in business to Used in business to print documentsprint documents

Printed output is Printed output is called hard copy called hard copy

Types Of PrintersTypes Of Printers

Impact PrintersImpact Printers

Non-impact printersNon-impact printers

Types Of Impact PrinterTypes Of Impact Printer

Dot matrix PrintersDot matrix Printers

Line PrintersLine Printers

Daisy wheel Printers Daisy wheel Printers

Dot matrix PrinterDot matrix Printer

It is impact printerIt is impact printer

Produces printed images when tiny Produces printed images when tiny pins strike inked ribbonpins strike inked ribbon

It uses 100 to 150 DPIIt uses 100 to 150 DPI

200 to 300 character per minute 200 to 300 character per minute

Line PrinterLine Printer

Fast impact printerFast impact printer Its speed measured in line per Its speed measured in line per

minute (some printer print 3000 line minute (some printer print 3000 line per minute)per minute)

TypesTypes

Band printerBand printer

Chain printerChain printer

Daisy Wheel PrinterDaisy Wheel Printer

Similar to typewriterSimilar to typewriter

Uses print wheel called daisy wheelUses print wheel called daisy wheel

Types Of Non-Impact PrinterTypes Of Non-Impact Printer

Inkjet PrintersInkjet Printers Laser PrintersLaser Printers Photo PrintersPhoto Printers

Inkjet PrinterInkjet Printer

It prints by spraying tiny drops of It prints by spraying tiny drops of liquid ink on paperliquid ink on paper

It can print 1 to 6 pages per minuteIt can print 1 to 6 pages per minute It is inexpensiveIt is inexpensive

Laser PrinterLaser Printer

It creates images on paper by laser It creates images on paper by laser beambeam

LASER stands for Light Amplification LASER stands for Light Amplification Emission Of RadiationEmission Of Radiation

Density of these dot ranges from 300 Density of these dot ranges from 300 to 2000 dots per inchto 2000 dots per inch

It is also called Page PrinterIt is also called Page Printer

Photo PrintersPhoto Printers

It is color printerIt is color printer

Also called Snapshot printerAlso called Snapshot printer

Specially designed to print high quality Specially designed to print high quality photographsphotographs

Some photo printers have built-in LCD Some photo printers have built-in LCD color screencolor screen

MonitorMonitor

Most commonly used Most commonly used output deviceoutput device

Output on monitor is Output on monitor is called soft copycalled soft copy

SpeakersSpeakers

Produces audio outputProduces audio output

Speakers produce music, speech or Speakers produce music, speech or other sound like beepother sound like beep

ProjectorsProjectors

It projects the output It projects the output of computer screen of computer screen on a larger screenon a larger screen

It is used to deliver It is used to deliver lecture to many lecture to many students in classstudents in class

ThanksThanks