Distributed Computing : 13th International Symposium DISC’99 Bratislava Slovak Republic September 27–29 1999 Proceedings This book constitutes the refereed proceedings of the 13th International Symposium on Distributed Computing DISC99 held in Bratislava Slovak Republic in September 1999.The 23 revised full papers presented with an invited paper were carefully reviewed and selected from a total of 75 submissions. The papers address a variety of current issues in distributed algorithms systems and programming in particular failure detectors broadcasting group communication services quorum systems cryptography randomness mutual exclusion networking protocols scheduling algorithms and self stabilization