SC-103PU (successor of the SC-103PC) is a powerful and freely available scientific calculator for the Palm platform. Apart from scientific functions it also offers a full set of logical operations and conversions between different numeric systems (HEX, DEC, OCT, BIN). Additionally, SC103PU offers a units mode for easy conversions between different units including currencies, as well as calculations with mixed units. The program is designed in a way, that it simulates the visual and operational aspects of a true calculator, such that the user will be immediately familiar with its interface.