Computers, computer hardware, computer peripheral devices, thin client computers, electronic security token in the nature of a fob-like device used by an authorized user of a computer system to facilitate authentication, USB (universal serial bus) hardware, USB computer access control key, USB computer security key, computer software for use with thin client computers, computer software for use in accessing computer networks, computer software for use in thin client server computing, thin and zero client operating system software, computer software which converts computers into thin client computers