Photocopier giant Xerox has announced it is acquiring US firm Affiliated Computer Services (ACS) for $6.4 billion. The deal will provide Xerox with data management and technology outsourcing capabilities, allowing it to gain a foothold in the rapidly expanding business process outsourcing (BPO) market. Norwalk, Connecticut-based Xerox is the worldÔÇÖs biggest supplier of digital printer and document management services.