As the Internet becomes increasingly popular, a new paradigm is being developed in networked computing known as nomadic computing or mobile computing. Mobile computing aims to provide a network infrastructure and corresponding terminal capability to perform all desktop-like computing functions seamlessly at any place or time, even while the terminal is moving. This means that anytime and anywhere, a user would be able to browse the web, check e-mail, play digital music, and perform all other computing activities without having to be behind a desktop at home or work. At its best, mobile computing would allow a user to have access to a consistent working environment.

Practically, mobile computing is a challenge for several reasons. For anytime, anywhere functionality, the user must be able to carry the mobile computing device. The computing device must be small, light, and at the same time be capable...