Raja umair arshed

FUNDAMENTAL OF INFORMATION SYSTEM

Presentaion

INPUT AND OUTPUT DEVICES

PREPEARED AND PRESENTED BY

Raja Umair Arshed BBA III

WHAT IS INPUT?What is input?

Input device is any hardware component that allows users to enter data and instructions

Data or instructions entered into memory of computer

WHAT IS INPUT?What are the two types of input?

Unprocessed text, numbers, images, audio, and video

Instructions Programs Commands User responses

Data

KEYBOARD Similar to typewriter keyboard. Keys on keyboard consist up of letters, numbers,

symbols and function keys. Special keys like Tab, Del, Ctrl, PgUp, PgDn,etc. Easy to use and offers number of facilities. Can edit the input data very easily. Relatively inexpensive.

MOUSE A pointing device. Control and manipulate cursor movement on

monitor. Has three or four buttons on it and roller ball

which signals the movements on a flat surface. Move fast from one part of the screen to the

other.

Tiltwheel

Tiltwheel

Presswheelbutton

Presswheelbutton

Free-spin

wheel

Free-spin

wheel

Right-drag

Right-drag

Right-click

Right-click

Triple-click

Triple-click

Double-click

Double-click

POINTING DEVICESWhat are common mouse operations?

PointPoint

ClickClick

DragDrag

Rotate wheel

Rotate wheel

TOUCH SCREEN

A touch panel is transparent plate. Input is registered when a finger or any other

object comes in contact with the plate.

BAR CODE READER It reads bar coded data. Laser beam scanner is used to read the bar

code. Most commonly used bar code is the Universal

Product Code (UPC).

DIGITAL CAMERAS What is a digital camera?

Next

Allows you to take digital pictures

Images viewable immediately on camera Download to

computer Post pictures

to Web

TRACK BALL Also known as roller ball. Uses a hard sphere to control cursor movement. Ball can be rotated in any direction by hand. This digital signal in translated to control the

cursor movement on the screen.

SCANNER It is able to directly enter text and images

into the computer memory. Eliminated the duplication work of entering

data . This result into increase in speed of data

entry and accuracy.

VOICE RECOGNITION SYSTEM Uses microphone or telephone, a sound card

an special software. Voice recognition system are highly operator

dependent. Reduces the cost of data entry. Can move freely while talking into the

computer.

JOYSTICK Widely used in computer or video games. The direction and speed with which the joystick is

moved is converted into digital signal and sent to the computer system.

This in turn controls the movement of the cursor on the screen.

VOICE INPUT What is voice input? The process of entering input by speaking into

a microphone Voice recognition is the computer’s capability

of distinguishing spoken words

VIDEO INPUT What is a PC video camera and a

Web cam? PC video camera is used to capture video and still images, and to make video telephone calls on Internet Also called PC camera

Web camc—cvideo camera whose output displays on a Web page

WHAT IS OUTPUT?What is output? Data that has been processed into a useful form

Output device is any hardware component that can convey information to one or more people

DISPLAY DEVICESWhat is a display

device? Output device that visually conveys text, graphics, and video information Information on display device sometimes

called soft copy

Monitor houses display device that is packaged as separate peripheral

MONITORS Monitor is a device like television screen which is used to display information The resolution of monitors is the number of picture elements Monitors are of two types

Cathode Ray Tube Monitor (CRT) Flat Panel Display

PRINTER

It produces the output from the computer on the paper.

Produces a hard copy i.e. permanent copy of the result which can be stored and read later. Impact Printers Non-Impact Printers

PLOTTER

A plotter is a an output device used in applications where printouts of graphs and drawings are required

Plotters are of two types Flat Bed Plotter Drum Plotters

SPEAKERS, HEADPHONES, AND EARPHONESWhat is an audio output device? Computer component that produces music, speech, or

other sounds Speakers and headsets are common devices

COMPUTER MICROFILM OUTPUT (COM) This technology is used to record computer

output as a microscopic film images. Information is recorded on a roll of film. COM devices are used applications where

there are large volumes of data. They are much more faster than normal

printers Sophisticated & Expensive