Original sentence: Bearded throwback to the sixties, hacker Richard Stallman serves as the movement's spiritual leader while Scandinavian Linus Torvalds acts as its mild mannered chief engineer (as developer of the operating system kernel)
Edited sentence: Bearded throwback to the sixties, hacker Richard Stallman serves as the movement's spiritual leader while Scandinavian Linus Torvalds acts as its mild mannered chief engineer (as developer of the Linux kernel)