Most of today's enterprises conduct knowledge management initiatives for achieving competitive advantage. Information technology plays a key role in codifying knowledge and distributing it throughout the organization. Ever since AutoRoute Express was launched for Psion's 3a palmtop in the mid-1990s, route planning and city mapping software has been very popular for palmtop computers. It makes sense, really. Rather than carrying a bulky guidebook or laptop with you, just rely on your PDA to tell you where you are and what restaurants, clubs and other attractions are in the immediate vicinity.