Oh and Bill in reference to "Invent" that wasn't in reference to you, but more as a generalisation to the media, lectures, press releases etc etc that I am sure that you have seen the same as myself, where it is quite common for some announcement to be made by a person and/or company, that they have just "invented" the greatest thing since sliced bread, and you look at the "invention" and KNOW that that same item has been around for years and years. The word "invention" is one of those words that today seem to have lost most of its finite meaning through over use and over abuse. It's like the entertainment industry today that has to find new superlative to "boost" the prestige of a particular artist. Words like "star" then "super star" then "mega star" and so it goes and through the inappropriate and over use of the word, it looses most of it's original meaning. Rereading the post I can see why you have assumed reference to yourself but let me clear that up when I say that I was not referring to you or any other one person.
Darryl