COMPUTER SYSTEM FUNDAMENTAL Genetic Computer School INPUT AND OUTPUT DEVICES LESSON 3

COMPUTER SYSTEM FUNDAMENTAL Genetic Computer School LESSON OVERVIEW  INPUT DEVICES  KEYBOARD ENTRY  DIRECT ENTRY  OTHER HARDWARE COMPONENTS  OUTPUT DEVICES  CMPUTER OUTPUT MICROFILM  SPEECH OUTPUT

COMPUTER SYSTEM FUNDAMENTAL Genetic Computer School INPUT DEVICES Input devices gather data and convert them into electronic form for use by the computer.  Keyboard Entry  Direct Entry

COMPUTER SYSTEM FUNDAMENTAL Genetic Computer School KEYBOARD ENTRY  Keyboard The principal method of data entry for entering text and numerical data into a computer.  Cursor Control Keys  Function Keys  Numeric Keys  Special-purpose Keys

COMPUTER SYSTEM FUNDAMENTAL Genetic Computer School TERMINALS A terminal is a form of input (and output) device that consists of a keyboard, a monitor and a communication link. These devices connect to host computer or server.  Dumb  Intelligent  Smart  Network  Internet

COMPUTER SYSTEM FUNDAMENTAL Genetic Computer School DIRECT ENTRY  POINTING DEVICES  Mouse  Joy Stick  Track Ball  Touch Pad  Touch Screen  Light Pen  Tablet  Digitizing Tablet  Digitizer  DITITAL CAMERAS  WEBCAMS  DIGITAL VIDEO CAMERAS  DIGITAL NOTEBOOK  SCANNING DEVICES  BIOMETRIC DEVICES  VOICE RECOGNITION SYSTEM

COMPUTER SYSTEM FUNDAMENTAL Genetic Computer School SOME SPCIAL PURPOSE MOUSE  Biometric Mouse (Fingerprint)  Germ Free Wireless Laser Mouse  UNOTRON ScrollSeal Washable Optical Mouse  Tel-mouse

COMPUTER SYSTEM FUNDAMENTAL Genetic Computer School SOME SCANNERS AND ASSOCIATED DEVICES  Optical Character Recognition (OCR)  Bar Code Scanner  Charge Coupled Device (CCD)  Laser Scanner  Triggerless Scanner  Wedge  Optical Mark Reader  Magnetic Ink Character Recognition  Image Scanners

COMPUTER SYSTEM FUNDAMENTAL Genetic Computer School VOICE RECOGNITION SYSTEM  Discrete-speech recognition system  Continuous-speech recognition system

COMPUTER SYSTEM FUNDAMENTAL Genetic Computer School OTHER HARDWARE COMPONENTS  Case  Card  Sound Cards  Colour Cards  Video Cards  Network Interface Card  Modem

COMPUTER SYSTEM FUNDAMENTAL Genetic Computer School OUTPUT DEVICES Output devices convert information coming from a computer system into some form perceptible by humans.  Visual  Auditory (non-speech, speech)  Tactile (Tactile output for visually- impaired and blind users e.g., Braille)

COMPUTER SYSTEM FUNDAMENTAL Genetic Computer School MONITORS  Monitors are the most common output devices for a computer system.  Most desktop computers use a monitor with a cathode tube and most notebooks use a liquid crystal display (LCD) monitor.

COMPUTER SYSTEM FUNDAMENTAL Genetic Computer School RESOLUTION OF THE MONITOR The greater the number of pixels, the greater the resolution of the monitor screen. The resolution of the screen is basically a measure of the degree of the detail and fineness or graphics displayed.

COMPUTER SYSTEM FUNDAMENTAL Genetic Computer School MONITORS: THREE MOST COMMOM STANDARDS  VGA Video Graphics Array 16 colors/resolution of 640 by 480.  Super VGA Super Video Graphics Array minimum resolution of800 by 600  XGA Extended Graphic Array resolution of up to 1024 by 768 pixels

COMPUTER SYSTEM FUNDAMENTAL Genetic Computer School DISPLAY TECHNOLOGY  Cathode Ray Tube, CRT  Liquid Crystal Display, LCD  Organic Light Emitting Diodes, OLEDs  Three Dimension, 3D  Digital Light Processing  Bistable Displays  Field Emission Displays (FED)

COMPUTER SYSTEM FUNDAMENTAL Genetic Computer School PRINTERS Printers are the most common hardcopy output devices. Classification of printers according to speed  Serial or character printers  Line printers  Page printers Classifying printers according to method of printing  Impact printers  Non-impact printers Classification of printers according to print quality  Draft quality  Near letter quality (NLQ)  Letter quality  Graphic quality

COMPUTER SYSTEM FUNDAMENTAL Genetic Computer School  Liquid Ink-jet Printers  Dye Sublimation Printers  Solid Ink-jet Printers  Thermal Wax Printers  Color Laser Printers PRINTERS (CONT:)

COMPUTER SYSTEM FUNDAMENTAL Genetic Computer School SPECIAL PURPOSE PRINTERS  Kodak Picture Makers  Thermo Autochrome  Snapshot Printers  Fujix Pictrography Printers  Film Recorders  Daisywheel Printers  Dot Matrix Printers  Drum Printers  Chain and Band Printers  Electrostatic Printers

COMPUTER SYSTEM FUNDAMENTAL Genetic Computer School PLOTTER  Hard Copy Plotter  Drum plotters  Flatbed plotters  Electrostatic plotter  Pen plotters  Ink-jet plotters  Direct-imaging plotters  Specialised photo-plotters

COMPUTER SYSTEM FUNDAMENTAL Genetic Computer School COMPUTER OUTPUT MICROFILM, COM It is a process for copying/printing data from electronic media located on PC’s, mini or mainframe computers onto microfilm. It consists of a high-speed recorder, which transfers digital data onto microfilm using laser technology, and a processor, which develops the microfilm once exposed to the light source. The recorder can operate "on" or "off-line," meaning that it can be connected to a single computer, a local or wide area network, a minicomputer, or a mainframe computer, or it can operate independently as a stand-alone device that reads digital data from formatted magnetic media, such as a tape.

COMPUTER SYSTEM FUNDAMENTAL Genetic Computer School THE BENEFITS OF COM  Reduction of paper  Cost reduction  Connectivity  Improved quality  Improved service  Electronic record retention/archiving

COMPUTER SYSTEM FUNDAMENTAL Genetic Computer School DISADVANTAGE OF COM  It is a very high cost of system.  Justifiable only if amount of output produced is very large.  The information recorded on film cannot be changed easily.

COMPUTER SYSTEM FUNDAMENTAL Genetic Computer School Speech Output It is also known as audio response, audio output, voice response, voice output and voice answer-back. It is a comparatively little used method of outputting information and instructions from a computer.

COMPUTER SYSTEM FUNDAMENTAL Genetic Computer School Haptic Devices They are mechanical devices that mediate communication between the user and the computer. They allow users to touch, feel and manipulate three-dimensional objects in virtual environments and tele-operated systems.

COMPUTER SYSTEM FUNDAMENTAL Genetic Computer School TWO MAIN TYPES OF HAPTIC DEVICES  Glove or Pen-type devices that allow the user to "touch" and manipulate 3- dementional virtual objects.  Devices that allow users to "feel" textures of 2-dementional objects with a pen or mouse-type interface.