There are 3 types of D.O.D. the first is Do or Die a four piece band from San Francisco, comprising of two women and two men who are no longer playing together.
The Second is Duo of Darkness a three piece band from Groningen; The Netherlands comprising of three friends rhymin' their way to the top. (www.last.fm/music/duo+of+darkness)
The third is is a British house music DJ & Producer, D.O.D Read more on Last.fm