lesson 2a l.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Introduction to Computers PowerPoint Presentation
Download Presentation
Introduction to Computers

Loading in 2 Seconds...

play fullscreen
1 / 23

Introduction to Computers - PowerPoint PPT Presentation


  • 483 Views
  • Uploaded on

Lesson 2A Introduction to Computers Keyboard Alphanumeric keys Modifier keys Numeric keypad Function keys Cursor-movement keys Special-purpose keys Click to Enlarge How the Computer Accepts Input from the Keyboard Keyboard controller Keyboard buffer Scan code Interrupt request

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Introduction to Computers' - medwin


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
keyboard
Keyboard
  • Alphanumeric keys
  • Modifier keys
  • Numeric keypad
  • Function keys
  • Cursor-movement keys
  • Special-purpose keys

Click to Enlarge

how the computer accepts input from the keyboard
How the Computer Accepts Input from the Keyboard
  • Keyboard controller
  • Keyboard buffer
  • Scan code
  • Interrupt request
  • Repeat rate

Click to Enlarge

the mouse
The Mouse
  • An input device that rolls around on a flat surface and controls the pointer
examples of mouse maneuvers
Examples of Mouse Maneuvers
  • Pointing
  • Clicking
  • Double-clicking
  • Dragging
  • Right-clicking
mouse variants
Mouse Variants
  • Trackball
  • Trackpad
  • Integrated pointing device
lesson 2a7
Lesson 2A
  • Standard Input Devices
keyboard8
Keyboard
  • Primary input device for entering text and numbers
standard keyboards have five groups of keys
Standard Keyboards Have Five Groups of Keys
  • Alphanumeric keys
  • Modifier keys
  • Numeric keypad
  • Function keys
  • Cursor-movement keys

Click to Enlarge

mouse
Mouse
  • An input device that rolls around on a flat surface and controls the pointer
pointer
Pointer
  • Also called the mouse pointer
  • An on-screen object for selecting text; accessing menus; and interacting with programs, files, or data
other pointing devices
Other Pointing Devices
  • Trackball
  • Trackpad, also called a touchpad
  • Joystick, also called an integrated pointing device, 3-D point stick, or TrackPoint
alternative input devices
Alternative Input Devices
  • Devices for the hand
  • Optical devices
  • Audiovisual devices
monitors
Monitors
  • Cathode ray tube (CRT)
  • Flat-panel. Most common flat-panel is the liquid crystal display (LCD) monitor
pixel
Pixel
  • Pixel, short for picture element, is the smallest number of phosphor dots that the electron gun inside the monitor can focus on
two main lcd categories
Two Main LCD Categories
  • Passive matrix LCDuses a transistor for each row and column of pixels.
  • Active matrix LCDuses a transistor for each pixel on the screen.

* Thin-film transistor displays use multiple transistors for each pixel.

other kinds of monitors
Other Kinds of Monitors
  • Plasma/gas plasma displayCreated by sandwiching a special gas between two sheets of glass.
four things to consider when monitor shopping
Four Things to Consider When Monitor Shopping
  • Size
  • Resolution
  • Refresh rate
  • Dot pitch
video controller
Video Controller
  • Intermediary device between the CPU and the monitor
  • Controls how things look on-screen

(VGA card)

sound card
Sound Card
  • Translates digital sounds into the electric current that is sent to the speakers
printers
Printers
  • Impact
  • Nonimpact
examples of printers
Examples of Printers
  • Dot matrix
  • Ink jet
  • Laser
four things to consider when printer shopping
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