All the "stat pack" stuff in Excel (which I used to do on a K&E log-log decitrig slide rule)...and lots of English to Metric conversions (why DID the Republican Congress trash the Metrification of the U.S. back whenever it was...the late 80's?) Anyway, I do know that if I want the Army Corps of Engineers to dredge a 19.2 meter shipping channel over a 42-foot-deep highway tunnel, I've got big problems...or a lot of wet cars.