Wireless markup language (WML) and WMLScript are programming languages that are used to provide information services to portable wireless devices. This book explains why and how to use gateway and language script to convert standard Internet web pages into a format usable by portable devices and some of the problems that can cause this. Readers will learn the structure of the WML language and how to create a script file that can control display of information on mobile devices and the different ways that users can control content delivery of information with limited keypads on mobile devices. How to use the gateway to convert standard Internet web pages into a format usable by portable devices ? The way that users can control content delivery of information with limited keypads on mobile devices ? How to make information services (push services) that can automatically provide information to mobile users without having to request information ?