A reader writes:

>>The tape was originally named DUCK TAPE because water rolled off of it just like the back of a duck. It later was called DUCT TAPE because it was used on heating and air conditioning ducts. You can properly call it DUCK or DUCT but when you ask most people today the will say DUCT TAPE.
I believe on Red Green they use the term DUCT TAPE and it is understood to be the greatest item ever invented since a man can fix anything with that tape no matter what you call it.