Unit4 has introduced Milestone 4, a product whose highlights include its support of social and mobile technologies. Available via the public and private cloud, the new ERP package is designed for what Unit4 says are people-centric business that have large mobile work forces. Functionality is being released in what the company terms "Experience Packs". Those are also available to on-premise users who can chose what areas of the product to focus on in terms of timing and order of an upgrade.