- A
*discrete system*is one in which the state variable(s) change only at a discrete set of points in time. E.g. customers arrive at 3:15, 3:23, 4:01, etc. - A
*continuous system*is one in which the state variable(s) change continuously over time. E.g. the amount of water flow over a dam.

Meng Xiannong 2002-10-18