The library’s agreement with ACM allows SU authors to publish OA in ACM journals at no cost. Authors can opt out of the OA arrangement and publish behind a paywall if they so choose.
ACM’s model is “unlimited read + unlimited publish” for authors.
SU authors have access to the ACM Open model
ACM, the world's largest educational and scientific computing society, delivers resources that advance computing as a science and a profession. ACM provides the computing field's premier Digital Library and serves its members and the computing profession with leading-edge publications, conferences, and career resources.