Coshed/SAS: Groupware and User Interfaces

Development in multimedia technology enhances Computer Supported Cooperative Work(CSCW) such as tole-conferencing and tole-education. These applications are also called groupware applications and usually composed of AM conferencing module and shared working space such as group editors. Through this shared working space users can present, manipulate and save common artifacts interactively. Since users are allowed to operate on common artifacts simultaneously, conflicts between user transactions are bound to happen and can cause unnatural effects on user interfaces. In this paper we reviewed these problems and presented common solutions to concurrency control problems. We also presented Coshed/SAS, a group editor, as an example of groupware applications and related concurrency control problems.