Details about special rates at the ACM FCRC hotel (Hyatt Regency Atlanta), transportation, childcare, and visiting Atlanta can be found on the 2027 ACM FCRC website under the "Attendee Info" tab.
The Association for Computing Machinery does not issue formal invitation letters for visas to attend ACM sponsored conferences. Instead, visa support letters are issued. Attendees can request visa support letters from ACM as soon as possible and don't need to wait for registration to open and/or be registered to request a letter. More information can be found on the 2027 ACM FCRC website under the "Attendee Info, Visa Support" page.