Wow. Today I learned that Denis Ritchie has passed away. Very sad.
I met him once at an Unix conference in London when the Plan 9 operating system was being evangalized as the logical successor to Unix.
I still have my copy of "K and R" - the book properly known as the C programming language book written by Kernighan and Ritchie. A true classic and, as far as I know, the worlds first "hello world" programming example.