In the era of PCs, here is one day which has modified the computer globe. It is the fourth of November 1975. There are perhaps not many people who are familiar with the day because it is not a national holiday and computer lovers do not celebrate it at all. It is a day of establishment of Microsoft Business. The founders of the victory – Bill Gates and Paul Allen have become recognized worldwide and earned many of money but what is the most important – they have created a transformation in the PC universe and modified it for better.