Kernel panicEdit
A kernel panic is a catastrophic (irrecoverable) failure in the kernel (core) of an operating system. Kernel panics are generally reserved for failed expectations about internal state rather than external errors; when code in the kernel finds itself in a state which it didn’t think should be possible, it aborts immediately rather than continuing (which might produced undefined results).
I maintain notes about my own kernel panic experiences (and other hard resets) in an involuntary reboot log.