UTRECHT, Netherlands--(BUSINESS WIRE)--Unit4, a fast growing leader in enterprise applications for service organizations, today announced the acquisition of U.S.-based student management solution provider, Three Rivers Systems, Inc. The acquisition supports Unit4’s strategy to offer market leading industry-specific solutions to people-centric businesses. Education has always been a key pillar of the company’s strategy. Together with Three Rivers Systems, Unit4 serves more than 1,000 clients in