TY - CONF T1 - Single display groupware: a model for co-present collaboration T2 - Proceedings of the SIGCHI conference on Human factors in computing systems: the CHI is the limit Y1 - 1999 A1 - Stewart,J. A1 - Bederson, Benjamin B. A1 - Druin, Allison JA - Proceedings of the SIGCHI conference on Human factors in computing systems: the CHI is the limit ER -