I view Death as the concept of decay, making something less than what it was. It doesn't have to be tied to organic life; the only prerequisite is sentience, as something can be called alive only if it has a mind. If a computer with artificial intelligence is alive, then its Death is the deterioration and eventual deletion of its operating system. Necromancy is the ultimate result of Death, because it completely unmakes a being's nature, turning that being into a tool to bring about the further destruction of others.