1. A computer that is configured for connection to a network of computers including the Internet, comprising: a master controlling device; at least two microprocessors, which are separate from any specialized processors; an internal firewall that is separate from and located between the master controlling device and at least a first one of the microprocessors; the firewall includes hardware and is configured to make the master controlling device of the computer inaccessible to the network of computers including the Internet when the computer is connected to the network of computers including the Internet; and the firewall is further configured so that at least the first one of the microprocessors is accessible to the network of computers including the Internet when the computer is connected to the network of computers including the Internet.