**apologies if you have received multiple copies of this email* *CALL FOR PAPERS* ACM SUI brings together top researchers and practitioners from around the world who focus on spatial interaction for Virtual Reality, Augmented Reality, Mixed Reality, and for ubiquitous, intelligent/smart and real environments. We invite contributions from a wide range of fields including design, social science, arts and creative Industries, and other application domains. ACM SUI 2023 is the 11th edition of the Symposium. We welcome you to join us in this premier international forum for sharing exciting new research and development in the field while meeting your peers and enjoying the beautiful Sydney! Accepted Workshops: Interactive Spatial Interfaces for Health and Well-being: https://www.xipeiren.com/hsi.html Accepted Workshops: Computer Vision for Spatial User Interaction (CvSUI 2023): https://dongl-group.github.io/project_pages/CvSUI_2023.html Approved SUI23 Special Issue: Computers & Graphics (SCI indexed, impact factor:1.821), all authors are invited after the conference: https://www.sciencedirect.com/journal/computers-and-graphics Please refer to https://sui.acm.org/2023/papers <https://sui.acm.org/2023/> for more details. *IMPORTANT PAPER DATES* Submission deadline: *June 23, 2023* Author notification: August 6, 2023 Camera Ready: August 27, 2023 *TOPICS* All topics that are directly or indirectly relevant to spatial user interactions and interfaces are welcome. Topics of interest include, but are not limited to: Design practices, principles and frameworks Interaction design, usability and user experience (UX) User interface metaphors Evaluation methodologies and metrics Perception and cognition Human factors and ergonomics Ethical, social, cultural and language factors Inclusion and accessibility Privacy and security Empathy, trust, acceptance and safety Interactive spatial computer graphics Spatial input devices and technology Haptics, spatial audio, touch, tangible, gesture based spatial interactions and interfaces Multimodal/multisensory and other novel forms of spatial interaction and perception Spatial interaction with data, virtual humans and avatars Distributed, multi-user and collaborative spatial interaction Immersive analytics and visualisation Intelligent spatial interfaces, interaction and collaboration User adaptive spatial interaction and personalization Applications of human spatial perception to interaction Applications of spatial UIs, such as games, entertainment, CAD, education, health, engineering