Welcome to 00lS01 and Calgary! This is the 7th International Conference on Object-Oriented Information Systems (OOlS) that focus on Object-Oriented and Web-Based Frameworks for Information Systems. In the last few years weve seen significant new development in this field, from one-off design technologies to reusable frameworks, and from web applications to bioinformatic systems. We perceive that information processing is one of the most important activities of human beings. Object-orientation and frameworks have been the main-stream technologies for design and implementation of large-scale and complex information systems. Recent research advances and industrial innovations in information systems modeling and Internet applications have explored the new trends in shifting information system vendors from component and system developers to services providers. Users of information systems are increasingly demanding higher performance, mobility, and personalization in order to realize the dream to access and obtain necessary information anywhere and anytime. The new development requires the investigation of new architectures, frameworks, processes, and inter-connectivity of information systems at society, organization, team, and personal levels. The 00lS01 Proceedings has put together a program of 53 papers from leading researchers and practitioners in the field of object technology and information systems.