DISC, the International Symposium on DIStributed Computing, is an annual forum for research presentations on all facets of distributed computing. DISC 2001 was held on Oct 3-5, 2001, in Lisbon, Portugal. This volume includes 23 contributed papers. It is expected that these papers will be submitted in more polished form to fully refereed scienti?c journals. The extended abstracts of this year's invited lectures, by Gerard LeLann and David Peleg, will appear in next year's proceedings. We received 70 regular submissions. These submissions were read and eval- ted by the program committee, with the help of external reviewers when needed. Overall, the quality of the submissions was excellent, and we were unable to - cept many deserving papers. This year's Best Student Paper award goes to Yong-Jik Kim for the paper "A Time Complexity Bound for Adaptive Mutual Exclusion" by Yong-Jik Kim and James H. Anderson. October 2001 Jennifer Welch Organizing Committee Chair: Luis Rodrigues (University of Lisbon) Publicity: Paulo Ver'?ssimo (University of Lisbon) Treasurer: Filipe Araujo ' (University of Lisbon) Web: Alexandre Pinto (University of Lisbon) Registration: Hugo Miranda (University of Lisbon) Steering Committee Faith Fich (U.
of Toronto) Michel Raynal (vice-chair) (IRISA) Maurice Herlihy (Brown U. ) Andr'e Schiper (chair) (EPF Lausanne) Prasad Jayanti (Dartmouth) Jennifer Welch (Texas A&M U. ) Shay Kutten (Technion) Program Committee Marcos K. Aguilera (Compaq SRC) Mark Moir (Sun Microsystems Laboratories) Lorenzo Alvisi (U. Texas, Austin) Stephane Perennes (CNRS U.