The deadline for the Gateways 2018 Call for Participation has been extended to Wednesday, May 16, 2018. Gateways 2018 (September 25-27, at the University of Texas at Austin) is accepting submissions of papers, demos, tutorials, and panels (2-4 pages) on the topic of science or engineering gateways. Topics may include their design, use, impact, development processes, sustainability, best practices, or any other aspect that you think fellow gateway creators or users will find interesting to learn. We also welcome educational topics directed toward the next generation of gateway creators. Submissions of papers, demos, tutorials, and panels are due May 16, 2018. There will be no further extension of this deadline. The poster session deadline (open to all) is August 1, 2018. Full submission details can be found here: https://sciencegateways.org/gateways2018/call