United States visa policy permits citizens of Canada and Bermuda to travel to the U.S. without a visa.
The Visa Waiver Program (VWP) allows citizens of participating countries to travel to the US without a visa for 90 days. Currently, 40 countries participate in the VWP. To travel, you must have authorization through ESTA prior to boarding. ESTA is the automated web-based system to determine eligibility to travel without a visa to the US. Visit the ESTA page.
All other visitors to the US require a non-immigrant visa. For more information visit the Visas page.
If you need a visa, please start the process as soon as possible, as wait times are unpredictable.
The Association for Computing Machinery does not issue formal invitation letters for visas to attend ACM sponsored conferences. We can however issue a visa support letter.
ACM is able to provide visa support letters to attendees as well as authors with accepted papers, posters, or members of the conference committee.
For visa support letters, please visit the following page.