Who is S. R. Ranganathan?

I ran across this name a few days ago in the collection development workshop (explained in previous post) and I got to wondering who is this S.R. Ranganathan. Turns out he was a mathematician and a librarian from India. Most noted in the field of librarianship for his "five laws of library science" and the development of the first major analytico-synthetic classification system, the Colon classification. He is considered to be the father of library science in India.
This is incredible! I never really thought of the "power house" librarians that shaped the domain as we know it. I mean we obviously know Melville Dewey, but after that who do we look up to? I have decided to cure my ignorance by doing a little digging to discover some of the most influential people that have changed the way we check out books. I'll keep you updated. My first step is to continue with the Ranganathan topic. I have found a book titled The Five Laws of Library Science written by Ranganthan (I figure this short post will not do Ranganthan justice, so I'll tell you a little more at a later date. I apologize for anyone who realizes this post does not thoroughly answer the title question). Due to the fact it is summer break obtaining this book will not be easy. I found it at a few academic libraries on worldcat.org. I think I'm going to have to put out an ILL. I post any findings on these important librarians as I find them.