[Computer-assisted surgery. The proposal of a surgical classification]

I present a proposal for a surgical classification in computer assisted surgery (CAS), with a surgical point of view to facilitate understanding and physicians, scientists, for and engineer to be able to communicate. I considered the system's participation into the CAS definition. In this classification, I find: simulated surgery, guided surgery, assisted surgery telepresence surgery, and semi-automated surgery. I describe the systems for each.