The PASC Conference Organizing Team is pleased to remind you that the Association for Computing Machinery (ACM) has generously authorized the posting of an Open Table of Contents (OpenTOC) for the Proceedings of the PASC Conference. This means that it is possible todownload the definitive versions of PASC Conference papers from the ACM Digital Libraryat no charge to the author or reader. The OpenTOC for the PASC Conference is hosted on the ACM’s SIGHPC website. Papers that were published at PASC21 can be accessed here.