This AAAI Symposium will explore the various aspects and meanings of trust between humans and machines in various situational contexts, and the social dynamics of trust in teams or organizations composed of autonomous machines working together with humans. We will seek to identify and/or develop methods for engendering trust between humans and autonomous machines, to consider the static and dynamic aspects of trust, and to propose metrics for measuring trust. Details, including invited speakers and program members, are displayed here at: https://sites.google.com/site/aaais2013trust/ with a summary located at AAAI’s Spring Symposia at: http://www.aaai.org/Symposia/Spring/sss13.php.