DISC, the International Symposium on DIStributed Computing, is an annual forum for research presentations on all facets of distributed computing. DISC 2000 was held on4-6 October, 2000 in Toledo, Spain. This volume includes 23 contributed papers and the extended abstract of an invited lecture from last year's DISC. It is expected that the regular papers will later be submitted in a more polished form to fully refereed scienti?c journals. The extended abstracts of this year's invited lectures, by Jean-Claude Bermond and Sam Toueg, will appear in next year's proceedings. We received over 100 regular submissions, a record for DISC. These s- missions were read and evaluated 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 accept many deserving papers. This year's Best Student Paper award goes to "Polynomial and Adaptive Long-Lived (2k?1)-Renaming" by Hagit Attiya and Arie Fouren. Arie Fouren is the student author.