1. INPUT AND OUTPUT

2. -2 Competencies Define input Describe keyboard entry, pointing devices, & scanning devices Discuss image capturing devices, digitizing devices, & audio input devices

3. -3 Competencies cont. Define output Describe monitors, printers, and audio output devices Discuss combination input & output devices

4. -4 What is Input? Any data or instructions used by a computer Input devices Hardware Keyboards Mice Scanners Other devices Translates data into a form that the system unit can process

5. -5 Keyboard Entry Keyboards Traditional keyboards Flexible keyboards Ergonomic keyboards Wireless keyboards PDA keyboards Features Typewriter keyboard with numeric pad Special purpose keys Toggle and combination keys

6. -6 Traditional Keyboard

7. -7 Pointing Devices Mouse Mechanical Optical Cordless or wireless Joystick Touch Screen Light Pen

8. -8 Scanning Devices Optical scanners Flatbed Portable Bar code readers Handheld wand readers or platform scanners Contain photoelectric cells that read bar codes

9. -9 Scanning Devices Character and mark recognition devices Scanners that recognize special characters & marks Magnetic ink character recognition (MICR) Optical-character recognition (OCR) Optical-mark recognition (OMR)

10. -10 Image Capturing Devices Digital camera Images recorded digitally on a disk Images can be downloaded to a computer Digital video camera Records motion digitally Can take still images as well WebCams Specialized digital video cameras Broadcast images over the Internet

11. -11 Digitizing Devices Graphics Tablets Digital Notepads

12. -12 Audio Input Devices Voice Voice recognition systems Discrete-speech recognition systems Continuous-speech recognition system Music Musical Interface Digital Interface (MIDI)

13. -13 What is Output? Processed data or information Types of output Text Graphics Audio & video Output devices Monitors Printers

14. -14 Monitors Known as screens or display screens Output referred to as soft copy Features Resolution Dot pitch Refresh rate Size

15. -15 More on Monitors Cathode-ray tube or CRTs Flat-panel Liquid crystal display (LCD) Portable and thinner than CRTs Other monitors E-books Data projectors High-definition television (HDTV)

16. -16 Printers Translates information that has been processed by the system unit Output referred to as hard copy Features Resolution Color capability Speed Memory

17. -17 Printers Ink-jet printer Laser printer Personal laser printers Shared laser printers Thermal printer Other printers Dot-matrix Plotters Photo printers

18. -18 Audio Output Devices Translates audio information into sounds that people can understand Common devices Speakers Headphones

19. -19 Combination Input and Output Devices Fax machines Multifunction devices Internet telephones Telephony Voice-over IP (VoIP) Terminals

20. -20 Terminals An input and output device Connects to a mainframe or server Types of terminals Dumb terminal Intelligent terminal Network terminal Internet terminal

21. -21 A Look to the Future Neural Signals Inc. Brain machine interface Allows humans to control machines with their thoughts Individuals incapable of communication Physically immobile people

22. -22 FAQs What are pointing devices? I would like to insert several images in a document. How can I capture the images? What are digitizing devices? What is voice recognition? What is the difference between a CRT and an LCD display? What is HDTV?

23. -23 Discussion Questions Describe the three different mouse types designed for input. How does Internet telephony work? Discuss. Discuss the features of multifunctional devices. Describe the features of a monitor that help to make images appear clearer on the screen. What are MIDI devices and how are they used?