When Xerox introduced its popular copying machines in 1959, their wizardry was considered as high tech as the iPhone when Steve Jobs presented it to the world almost 50 years later. But just as Xerox made carbon paper obsolete, the iPhone, Google Docs and the cloud made Xerox a company of the past. On Wednesday, Xerox said that, after 115 years as an independent business, it would combine operations with Fujifilm Holdings of Japan.