sentence: projects include helping apple design the user-interface for applelink personal edition ( which became aol ) , hp with the design of the user interface for its halo telepresence system , kaiser permanente improve its online library for physicians and nurses , sabre revolutionize its graphical user-interface design for one-third of the world 's travel agents , livescribe with the first version of its smartpen , and sap 's with sustainability-oriented enterprise software .