When you need the facts, turn to the 2010 Britannica Ultimate Reference DVD for trusted information written by Nobel laureates, historians, curators, professors, and other noted authorities. From the youngest student to the curious adult to the most advanced researcher, users of every level will find what they need. Three age-appropriate encyclopedias; interactive tutorials in math, science, social studies, and other subjects; homework help; and other essential learning tools make it the most complete reference source available.