Lesson 1 B Introduction to Computers Keyboard Primary

Lesson 1 B Introduction to Computers

Keyboard Primary input device for entering text and numbers home

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

Mouse An input device that rolls around on a flat surface and controls the pointer home

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

Other Pointing Devices Trackball Trackpad, also called a touchpad Joystick, also called an integrated pointing device, 3 -D point stick, or Track. Point home

Alternative Input Devices for the hand Optical devices Audiovisual devices home

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

Two Main LCD Categories Passive matrix LCD Active matrix LCD home

Four Things to Consider When Monitor Shopping Size Resolution Refresh rate Dot pitch home

Video Controller An intermediary device between the CPU and the monitor home

Sound Card Translates digital sounds into the electric current that is sent to the speakers home

Printers Impact Nonimpact home

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 home

Examples of Printers Dot matrix Ink jet Laser home

Lesson 1 B Interacting With a Computer