Thanks for the explaination Helen. That one was a new one on me. My vocabulary is getting better and better the longer I am on this list. I've got a sneaking hunch we have a lot of retired teachers in this group. <grin> Retired teacher? Not me - I would never have had the patience. Actually, I'm a retired Computer Specialist with 30 years of working with main frame systems. I'm ancient enough, though, that I can remember my grandmother speaking of a felon. Helen