Mitnick is the most famous computer hacker, now a writer and information security specialist.
IDEOLOGUES OF HACKER ETHICS
Richard Stallman is the founder of the GNU Project and the FSF.
Eric Raymond is a writer, editor, and curator of the Jargon File, an online encyclopedia of hacker slang and hacker culture.
NOTABLE HACKER PROGRAMMERS
Linus Torvalds is the creator of the Linux kernel, which gave rise to the eponymous (more correctly called GNU / Linux) family of free-licensed operating systems used in a variety of areas.