WHAT IS INPUT?What is input? Data or instructions entered into memory of computer Input device is any hardware component that allows users to enter data and instructions
WHAT IS INPUT?What are the two types of input? Data Unprocessed text, numbers, images, audio, and video Instructions Programs Commands User responses
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.
POINTING DEVICESWhat are common mouse operations? Point Double- Triple- Right- Click click click click Right- Drag drag Free- Press Rotate Tilt spin wheel wheel wheel wheel button
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? Allows you to take digital pictures Images viewable immediately on camera Download to computer Post pictures to Web Next
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 INPUTWhat is a PC video camera and a Webcam? PC video camera is used to capture video and still images, and to make video telephone calls on Internet Also called PC camera Web cam — video camera c c 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 displaydevice?device that visually conveys text, Output 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 liketelevision screen whichis used to display information The resolution of monitorsis the number of picture elements Monitors are of two types Cathode Ray Tube Monitor (CRT) Flat Panel Display
PRINTER Itproduces 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. ImpactPrinters Non-Impact Printers
PLOTTERA plotter is a an output deviceused in applications whereprintouts of graphs anddrawings 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