PC switching device selectively switching between an input device and a plurality of computers having different electric power control mechanisms

This invention is to provide a PC switching device which can be applied to various kinds of PC's, some of which have an electric power control method different from the others.When a plurality of PC's 621 624, the power of which are controlled by power control keys installed on keyboards are operated by single KB 63 without a power control key, power control switches PC-PSW 1 4 installed on the PC switching device 61 can control the power of the corresponding PC. When switches PC-PSW 1 4 are pressed again, main CPU 610 outputs a key-code to PC's 621 624 through sub-PC's 611 614, and can control the power of PC's.