Book excerpt: The only guide for developers and power users on how to build PC connectivity applications for Symbian OS. This unique handbook provides all the information that is needed for the job. Fully worked examples and a do's and don'ts section provide design recommendations and expose common pitfalls giving a highly practical focus. Explains the relevant parts of the protocols that need to be used Demonstrates how to create your own device side components to provide new services Shows how to handle custom servers and socket servers