The 28th ACM Symposium on Operating Systems Principles
October 25-28, 2021

Welcome to the SOSP 2021 Website

The biennial ACM Symposium on Operating Systems Principles is the world's premier forum for researchers, developers, programmers, and teachers of computer systems technology. Academic and industrial participants present research and experience papers that cover the full range of theory and practice of computer systems software.

Due to the ongoing global pandemic, the ACM SIGOPS steering committee has elected to move SOSP 2021 to an online format. Please see this announcement for details about the change in format.

  • July 21st, 2021: Want to join the Artifact Evaluation Committee? Nominate yourself here! Deadline August 6th.
  • July 21st, 2021: Artifact Evaluation details have been announced. See the sysartifacts site for details.
  • May 28th, 2021: PLOS 2021 workshop announced
  • May 28th, 2021: ResilientFL 2021 workshop announced
  • March 19th, 2021: Student Research Competition announced. Abstracts due July 30th.
Important Dates
Event Info Date Link
Deadline to Register Abstracts April 30, 2021 (2:59 PM US/Pacific) Submission Site
Submission Deadline (No extensions) May 7, 2021 (2:59 PM US/Pacific) Submission Site
Reviews available for author response July 20, 2021
Author Response due July 23, 2021 (2:59 PM US/Pacific)
Acceptance Notification August 9, 2021
Camera Ready due September 27, 2021
Workshop Proposals Due April 30, 2021 (2:59 PM US/Pacific) Call For Workshops
Workshop Notification of Acceptance May 3, 2021
Workshop Call For Papers Due May 6, 2021 (2:59 PM US/Pacific)
Student Research Competition Abstracts Due July 30, 2021 Student Research Competition
AE Committee Self-Nominations Due August 6, 2021 See Artifact Evaluation
PLOS Submission Deadline August 6, 2021 Workshops
ResilientFL Submission Deadline August 24, 2021 Workshops
Workshops Date October 25, 2021
Conference Dates October 26-28, 2021

Any organizational questions about the conference can be emailed to The program committee chairs can be reached at