Xerox Corp. is not a copy of its former self. The company, whose name has been a synonym for “to copy,” remains a leading seller of copiers and printers, from basic black-and-white output to high-end color systems. These days, Xerox makes most of its revenue from its post-sale services such as document management, maintenance, supplies and paper, and financing. Xerox also sells software for automating and integrating print jobs from start to finish. Its products are used in offices of large and small- and medium-sized businesses and in production plants of commercial printing companies. US customers account for about 60% of revenue.