Mouse

2. 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. Mouse is used to move a cursor on the computer screen, and make various
operations possible such as drawing, selecting text and graphics,
opening and closing files, and giving other commands. The wire
connecting it to the computer or keyboard looks like a mouse’s tail.
A mouse is moved over a flat horizontal surface, usually a rubber
mouse pad, and its position is read by the computer as relative x
and y coordinates. There are predominantly two kinds of mouse.
a. Normal Mouse: This mouse typically has a roller ball, which
requires regular cleaning for proper functioning.
b. Optical Mouse: This mouse typically has optical light
through which the it sends the computer its x and y coordinates
c. Cordless mouse: This mouse is typically one of the above,
but instead of using a cord for connecting itself to the PC, it
uses Radio Frequency or Infra Red technology to communicate.
However this has a problem, one it consumes too many
batteries, and second it causes interference with other RF or IR
devices.
3. In case of Touch Screen Panels/Monitors, the screen also senses the location of the contact point as one touches the
screen and takes the corresponding action as suggested. Typical example of a touch screen panel, is an ATM machine.
4. Joysticks as the name suggests are devices used to playing games on the computer, initially they started with single
stick with a few buttons, each designated a particular function in the game, these days more upgraded ones offer, car
steering options as well.
5. Scanner are devices used to convert documents or images into binary files which are stored and reproduced as
exact duplicate images in the computer.