Functionalism is very similar to physicalism. An interesting corollary to functionalism is that mental states are "said to be realized on multiple levels." In other words, computers and other systems could have the same sense sense of identity as humans.

From Wikipedia's article on Functionalism:

"Since mental states are identified by a functional role, they are said to be realized on multiple levels; in other words, they are able to be manifested in various systems, even perhaps computers, so long as the system performs the appropriate functions. While computers are physical devices with electronic substrate that perform computations on inputs to give outputs, so brains are physical devices with neural substrate that perform computations on inputs which produce behaviors."

Just something interesting to think about...