Proceedings of the 10th ACM Symposium on Operating Systems Principles : Proceedings of the Ninth ACM Symposium on Operating Systems Principles Proceedings of the Tenth ACM Symposium on Operating Systems Principles Proceedings of the Sixth Symposium on operating systems principles : Proceedings of the 9th ACM Symposium on Operating Systems Principles : Ninth ACM Symposium on Operating Systems Principles 9th ACM symposium on Operating Systems Principles Symposium on operating systems principles Proceedings of the 10th ACM Symposium on Operating Systems Principles : 1-4 Dec., 1985, Washington, U.S.A. / ACM Symposium on Operating Systems Principles