>The Top Ten Things Engineering School didn't teach > >7. Anything practical you learn will be obsolete before you use it, > except the complex math, which you will never use. Starngely, one of the first jobs I was given after graduation used complex maths in a real-world telephone reticulation application :-) Twas related to paralleling cables together prior to a telephone exchange cutover and we waneted to know what the result of using diode isolators would be on the transmission losses. gave me a much greater appreciation for the nuts-and-bolts usefulness of such abstract stuff :-). RM