What is an Input Devices
A method of activating or sending information to a computer or other electronic device.
Keyboards, mice and trackballs are common computer input devices.
A device that allows the user of a system to enter information into a system such as a computer.
This can be via alternative modalities.
KEYBOARD
You can type on a computer keyboard. learn When you learn, you find out something new.
ABCDEFGHIJKLMNOPQRSTU VWXYZ letters There are 26 letters in our alphabet. librarian
A keyboard on a computer is almost identical to a keyboard on a typewriter. Computer keyboards
will typically have extra keys, however. Some of these keys (common examples include Control,
Alt, and Meta) are meant to be used in conjunction with other keys just like shift on a regular typewriter.
Other keys (common examples include Insert, Delete, Home, End, Help, function
keys,etc.) are meant to be used independently and often perform editing tasks. Keyboards on
different platforms will often look slightly different and have somewhat different collections of
keys. Some keyboards even have independent shift lock and caps lock. Trackball
keys. Some keyboards even have independent shift lock and caps lock
much in one spot. They're also very handy for some types of games, and popular on laptops
because they're compact
A trackball is an upside-down mouse that remains stationary on your desk. You roll the ball with
your fingers or palm to move the pointer on the screen. A trackball is a great alternative to a
mouse when you have limited desk space. LIGHT PEN a pen-like, contact reader that is hand-held, typically employing an infrared or normal source of
light. See wand reader, contact reader. linear barcode
A light-sensitive input device shaped like a pen, used to draw on the computer screen or to make
menu selections. As the tip of the light pen makes contact with the screen, it sends a signal back
to the computer containing the xy coordinates of the pixels at that point. Scanner A device for capturing a digital image. There are many types of scanners, such as flatbed
scanners, drum scanners, slide scanners, and microfilm scanners.
A peripheral for digitising documents (photos, slides, drawings, texts), though it can also digitise
small objects. It is an essential tool for putting pictures on a personal web site.
MOUSE A mouse is a handheld pointing device for computers, involving a small object fitted with one or
more buttons and shaped to sit naturally under the hand. The underside of the mouse houses a
device that detects the mouse's motion relative to the flat surface on which it sits. The mouse's
2D motion is typically translated into the motion of a cursor on the display.
A mouse is a small device with a ball on the bottom. As you move the mouse across a surface,
the ball turns, turning receptors inside the mouse. These receptors send signals to the computer
which cause a pointer or cursor on screen to move in a way which corresponds to the direction
and speed the mouse was moved (Try turning the mouse backward- away from the computer-
and moving it.). There are also optical mouses, that track the motion of the mouse by reflecting
light off of a special mouse pad.
Touch Screen Input device over the television or a special computer screen that is used to simplify user input
and response. The user touches the screen rather than a keyboard, keypad, or mouse to control
the output. Touch screens work best with menus or multiple-choice decision points, and also
allow some simulation of hands-on training, ie pointing to parts of a body.
A device which senses the position of the user's contact with the screen of a computer. It enables
young pupils in particular to respond to the computer by pointing to items shown on the screen.
Pointing Stick A pointing stick is a small, eraser-like device that you push in different directions to move the
pointer on the screen.
Touch pads A large sensitive board at the end of each lane where a swimmer's touch is registered and sent
electronically to the timing system.
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