Bio-Droid
first developed by Cestus Cybernetics, this form of droid was produced after the discovery of "living circuits", just before the onset of the Clone Wars. Using this new technology, droids could be manufactured with the ability to learn about and anticipate an opponent's moves, giving them an advantage that most droids had never been given. The technology for bio-droids was provided to the Confederacy of Independent Systems, to augment the already formidable droids armies of the Separatists. Originally, bio-droids were to be used as security forces. Count Dooku, however, immediately recognized their potential as combat droids, and ordered millions of them.