I have always been fascinated by computer viruses/malwares which is my primary motivation to teach myself system programming.<p>I'm wondering if there is any value to drill into pre-Win2000 era viruses? I heard that subsequent advances in computer security made all of those exploitations obsolete. I have on my HD the "Little Black Book of Computer Viruses" which focuses on DOS viruses. I don't have any DOS programming experience so barely read it, but reading a book that openly teaches one how to write a virus excites me a lot.