sentences:  Together with Daniel P. Friedman, he has long advocated the use of the Scheme language in teaching computer science.He is now professor emeritus, having retired from Indiana University (IU) to join Cisco in 2011.For his contributions to both the practical and theoretical aspects of computing and information technology, in particular his design and development of Chez Scheme, the Association for Computing Machinery (ACM) named Dybvig a Distinguished Member in 2006, the first year the association awarded distinguished ranks.