Recent progress in hardware and software technology for CAAD systems offer new challenges and opportunities to architects and design educators in aspects such as modelling systems for sketching and design evaluation, knowledge bases as a source of design thinking, network or CD-ROM image banks of design archives, video-conferencing to support geographically distributed interdisciplinary collaboration, etc. Despite expectations that CAAD system would support creative and productive design processes more effectively than those in a traditional design studio, their contributions to architectural design practice and design education still seem to be limited. The fault is, in part, that there are many designers and educators who have yet to experience designing in the medium (as opposed to simply drafting) and partly because digital design tools and technologies have still to be developed or to be integrated to a process of designers'activities. Clearly there are opportunities for further efforts to explore and develop better CAAD technologies as well as to demonstrate and prove possible impact of their application on design practice and design education.