This document discusses the use of mobile devices like PDAs and smartphones for public health work. It provides examples of software tools that have been used for data collection and medical protocols on mobile devices. These include EpiSurveyor for epidemiological surveys, Satellite Forms for application design, and Voxiva for large-scale projects. The document also discusses considerations for mobile health projects, like optimizing for small screens and taking advantage of connectivity. It announces a scholarship program to review literature on handheld computers in healthcare.