The ACM Symposium on User Interface Software and Technology (UIST) is the premier forum for innovations in human-computer interfaces. Sponsored by ACM special interest groups on computer-human interaction (SIGCHI) and computer graphics (SIGGRAPH), UIST brings together people from diverse areas including graphical & web user interfaces, tangible & ubiquitous computing, virtual & augmented reality, multimedia, new input & output devices, and CSCW. The intimate single track size make UIST an ideal opportunity to exchange research results and ideas. UIST 2013 (October 8-11) will be co-locating with ITS 2013, the ACM Interactive Tabletops and Surfaces 2013 conferences. ITS 2013 ends just before the UIST main program starts on October 9th.