This 17-volume set LNCS 4550-4566 constitutes the refereed proceedings of the 12th International Conference on Human-Computer Interaction, HCII 2007, and of all the associated symposia and conferences during the event in Beijing, China, in July 2007.

The 1695 revised papers presented in the 17 volumes were carefully reviewed and selected from a total of over 3400 submissions. The papers accepted for presentation thoroughly cover the entire field of Human-Computer Interaction, addressing major advances in knowledge and effective use of computers in a variety of application areas....