"Kernal Joe" is a forthcoming action figure from Mattel. He is GI Joe's smarter brother, and he is a BeOS programmer. Kernel Joe is cool.
While we all wait eagerly for Kernel Joe to arrive in toy stores worldwide, "kernel_joe" is the BeOS kernel for BeBox hardware. If you are running the BeOS on a BeBox, this software is essential (while "kernel_mac" is unused). Vice versa if you are running the BeOS on Power Macintosh hardware. kernel_joe does not get installed on Intel systems (it's PowerPC-specific).