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Introduction to Computers

Lesson 1B Introduction to Computers Keyboard Primary input device for entering text and numbers Standard Keyboards Have Five Groups of Keys Alphanumeric keys Modifier keys Numeric keypad Function keys Cursor-movement keys Click to Enlarge Mouse

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Introduction to Computers

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  1. Lesson 1B Introduction to Computers

  2. Keyboard • Primary input device for entering text and numbers

  3. Standard Keyboards Have Five Groups of Keys • Alphanumeric keys • Modifier keys • Numeric keypad • Function keys • Cursor-movement keys Click to Enlarge

  4. Mouse • An input device that rolls around on a flat surface and controls the pointer

  5. Pointer • Also called the mouse pointer • An on-screen object for selecting text; accessing menus; and interacting with programs, files, or data

  6. Other Pointing Devices • Trackball • Trackpad, also called a touchpad • Joystick, also called an integrated pointing device, 3-D point stick, or TrackPoint

  7. Alternative Input Devices • Devices for the hand • Optical devices • Audiovisual devices

  8. Monitors • Cathode ray tube (CRT) • Flat-panel. Most common flat-panel is the liquid crystal display (LCD) monitor

  9. Two Main LCD Categories • Passive matrix LCD • Active matrix LCD

  10. Four Things to Consider When Monitor Shopping • Size • Resolution • Refresh rate • Dot pitch

  11. Video Controller • An intermediary device between the CPU and the monitor

  12. Sound Card • Translates digital sounds into the electric current that is sent to the speakers

  13. Printers • Impact • Nonimpact

  14. Four Things to Consider When Printer Shopping • Image quality, measured in dots per inch (dpi) • Speed, measured in pages per minute (ppm) • Initial cost • Cost of operation

  15. Examples of Printers • Dot matrix • Ink jet • Laser

  16. Lesson 1B • Interacting With a Computer

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