1. A computer system comprising: an English language operating system; an English language basic input and output operating system for controlling operations of the English operating system and a plurality of input and output units in order to execute English language application software compatible with the English language operating system; an emulator for providing an interface between a non-English language application software and said English language operating system and an interface between said non-English language application software and said English language basic input and output operating system in order to execute said non-English Language application software; processor means for executing said English language operating system, said English language basic input and output operating system, said non-English language application software, and said emulator; wherein said emulator is loaded into and unloaded from memory storage means of said computer system independent from loading said English language operating system and said English language basic input/output control program from said memory storage means.