Nowadays, pen-based mobile computing devices, such as PDA and other handheld devices are becoming popular. Because of their personal nature, such devices are expected to conform well to the cultural expectations of their users. However, such devices originally do not support natural languages such as Amharic that use Ethiopic script for writing, and this makes the users to communicate with the device in a foreign language. Thus, localization of these devices to those languages is crucial for the utilization of the devices for local language applications. As online handwriting recognition is one of the basic features of pen-computing devices, this book presents a model for multi-script (Latin and Ethiopic script) text editing based on online handwriting recognition. The designed model aims to facilitate users task such as note taking, memo handling, communicating and saving messages with their language of preference. Based on the model, this book presents all the techniques required to develop a Multi-script Text Editing system using online Handwriting Recognition for the case of Ethiopic and Latin script for PDA devices.