Melvil Dewey is a great librarian and he created the "Dewey Decimal System. The "Dewey Decimal System" makes finding books a whole lot easier. This system makes finding books easier because first of all "The Dewey Decimal System" separates books into 10 different groups, then gives every book a number. I used this system to find a book for my Country Report.I think this system is very usefull.