Seventeenth International Workshop on Algebraic and Combinatorial Coding Theory ACCT 2020 June 9 -  15, 2020, Albena, BULGARIA ACCT is postponed for October 11-17, 2020, due to the coronavirus pandemia. New deadlines!!! We apologize for any inconvenience caused and truly hope to see you in October's ACCT. ORGANIZED BY: Institute of Mathematics and Informatics, Bulgarian Academy of Sciences, Bulgaria Skolkovo Institute of Science and Technology, Russia Institute for Information Transmission Problems, Russian Academy of Sciences, Russia TOPICS: Linear codes LDPC and polar codes Self-dual codes Algebraic-geometric codes Fast decoding New problems in coding theory Covering problems Combinatorial codes and designs Coding theory problems of cryptography Computer systems in coding theory Network coding Related topics   SUBMISSIONS: Authors are invited to submit camera-ready papers in Latex (at most six [...]