Lesson 5 Input, Output, and Storage

1. Lesson 5Input, Output, and Storage Computer Concepts BASICS 4th Edition Wells

2. Objectives Identify and describe the most common input devices Identify and describe the most common output devices Identify and describe storage devices Identify and describe how input and output devices are connected to the computer 2

3. Vocabulary audio input biometrics hard disk inkjet printer input input devices keyboard laser printer monitor mouse 3

4. Vocabulary (continued) optical storage output output devices pointing device solid-state storage USB flash drive video input 4

5. Input Devices Input devicesenable you to input data and commands into the computer The keyboardis the most commonly used input device for entering numeric and alphabetic data into a computer A wide variety of keyboards are available: ergonomic, wireless, specialized, security, and flexible 5

6. Input Devices (continued) A pointing deviceis an input device that allows a user to position the pointeron the screen The mouseis the most commonly used pointing device for personal computers Optical Mouse 6 6

7. Input Devices (continued) The trackball is a pointing device that works like a mouse turned upside down; the ball is on top of the device. 7

8. Input Devices (continued) The joystick and wheel are also pointing devices, primarily used in games. The pointing stick looks like an eraser and is generally on keyboard. 8 8

9. Input Devices (continued) • Other Input Devices: • Scanner • Digital Camera • Video Input • Virtual Devices • Touch-sensitive pad • Graphics tablet • Touch display screen • Stylus • Audio/Voice Input • Touchpad 9

10. Input Devices (continued) Biometric Input: Biometric is an authentication technique using a person’s physiological or behavioral characteristics Biometric keyboard scanner 10 10

11. Storage Devices Short-term data is stored in RAM (temporary memory) Longer term storage requires another medium such as the hard drive or USB drive Storage devices are categorized by: magnetic technology optical technology solid-state storage media 11 11

12. Storage Devices (continued) Magnetic storage devices Use oxide-coated plastic storage media called Mylar Data stored on tracks Each track is labeled and the location kept in a file allocation table (FAT) Types of magnetic storage: Floppy disk, hard disk, magnetic tape 12 12

13. Storage Devices (continued) • Hard disk 13

14. Storage Devices (continued) Optical storage devices Use laser technology to read/write on silver platters Most common types are CDs and DVDs Blu-ray is a new high-capacity storage medium that is expected to replace conventional DVDs A laser reads data on a CD or DVD 14 14

15. Storage Devices (continued) Solid-state storage media Non volatile, removable medium Everything processed electronically, no moving parts Miniature mobile media, USB flash drives Miniature mobile storage media 15 15

16. Caring for Storage Media Keep away from magnetic fields (monitor or TV) Avoid extreme temperatures Remove from drive and store properly when not in use Hold optical discs at the edges Do not remove media from a drive when the drive indicator light is on Keep disks in a sturdy case when transporting 16 16

17. Output Devices Output is data that has been processed into a useful format Printed text, spoken words, music, pictures, video, or graphics 17 17

18. Output Devices (continued) Monitors is an output device used as a computer display CRT, LCD, and gas plasma a. CRT b. LCD display c. Gas plasma display 18 18

19. Output Devices (continued) Printers are evaluated based on speed, print quality, and price Impact and non-impact models Laser printers (non-impact) Inkjet printers (non-impact) Dot matrix (impact) Specialty printers: thermal, mobile, label, and plotters 19 19

20. Output Devices (continued) Other Output Devices: Speakers and headsets Fax machines and fax modems Multifunction peripherals such as an all-in-one machine that does printing, scanning, copying, and faxing Data projectors 20 20

21. Connecting Input/Output (I/O) Devices to the Computer Input and output devices must be connected to the computer Physical connection, such as a port Wireless connection, such as through infrared or radio waves 21 21

22. Summary In this lesson, you learned: • Input devices enable you to input data and commands into the computer. • The most common input devices are the keyboard and mouse. • Other types of input devices include the trackball, joystick and wheel, pointing stick, graphics tablet, touch display screen, stylus, voice recognition devices, touchpad, scanner, digital camera, video input, and biometric input. 22

23. Summary (continued) • To maintain a permanent copy of data, you should store it on some type of storage medium. • The three categories of storage media are magnetic storage, optical storage, and solid-state storage. • Monitors and printers are examples of output devices. • Monitors produce soft copy. 23

24. Summary (continued) • Printers are used to produce a paper or hard copy of the processed result. • Criteria for selecting a printer include speed, print quality, and cost. • Input and output devices must be connected to the computer. • Some I/O devices communicate with the computer through a physical connection. • Wireless devices communicate with the computer through infrared or radio waves. 24