    Sentence 1: After it has been installed, the DOS, as it i  called (once identified, nothing in computercse is ever  called by its full name a Personal Computer becomes a  |PC; a Disk Operating System becomes a DOS; if it is  made by a company called MicroSoft, it is called MS/  DOS), performs certain functions, though yarely any  that anyone but a computer specialist would want to  perform    Sentence 2: Microsoft create the most amount of  software out of all software companies    