Input Devices, Continued
Mice
A mouse is an input device that allows the SYSOP to stroke functions and
commands rapidly into the computer without touching a keyboard. It also
provides a synchronous movement for drawing. The two types of mice are
the mechanical mouse and the optical mouse. The mechanical mouse fits in
the palm of the hand and rolls around either on a small ball or on small
wheels that roll around the ball. This movement moves the cursor on the
screen. The optical mouse also moves the cursor, but it uses a beam of light
on a reflective mouse pad. Press or click the mouse buttons to access
functions or commands.
Figure 3-3 shows a mechanical mouse on a mouse pad. The mouse pad
protects the ball inside the mouse from collecting dust from the tabletop.
Figure 3-3. —A mechanical mouse.
Joysticks and
Joysticks and trackballs are like mice in that they allow rapid access to
trackballs
functions; however, they are most often used in game playing or contests of
skill. They resemble cockpit wheels, triggers, and guns.
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