Abstract
The need for visualisation applications developed for small handheld devices such as PDAs and intelligent mobiles are growing. A visual user interface VUI model based on zooming user interface techniques (ZUI), to adapt two complete different visualisation application areas; on-line brand shopping and flood warning system for PDAs, is presented. The on-line brand shopping was evaluated in a benchmark usability study comparing it to traditional PC based eNet shopping. This paper is also a blueprint to inform researchers and software engineers about our experience in developing visualisation applications for PDAs with existing development platforms.