Help - Timer Stopwatch
The applet simulates a stopwatch than can be run forward and backward and thus act as a timer.

There are no assumptions other than that the computer clock is running accurately to one hundredth of a second.

Although the applet responds to a mouse click within a time interval that is shorter than one hundredth of a second, there is a delay in the response of the stopwatch applet related to the time it takes for the mouse button to be pressed. Only when the button is fully pressed will the clock start or stop running.