I'm a computer programmer who's worked with computers since the beginning of time but still doesn't know it all. I mostly work in Java, some C; my *NIX flavor is OpenBSD.
My best known public works are the *NIX file command and web hosting reviews in C, and the O'Reilly Java Cookbook. I've done several shorter O'Reilly books, including the ancient Checking C Programs with Lint and the much newer Checking Java Programs (with Open Source Tools).
I've written a complete PIM and it worked, but it sucked^H^H^H^H^H^H^H it was never quite ready for prime time.