The IFIP World Computer Congress (WCC) is one of the most important conferences in the area of computer science at the worldwide level and it has a federated structure, which takes into account the rapidly growing and expanding interests in this area. Informatics is rapidly changing and becoming more and more connected to a number of human and social science disciplines. Human-computer interaction is now a mature and still dynamically evolving part of this area, which is represented in IFIP by the Technical Committee 13 on HCI. In this WCC edition it was interesting and useful to have again a Symposium on Human-Computer Interaction in order to p- sent and discuss a number of contributions in this field. There has been increasing awareness among designers of interactive systems of the importance of designing for usability, but we are still far from having products that are really usable, and usability can mean different things depending on the app- cation domain. We are all aware that too many users of current technology often feel frustrated because computer systems are not compatible with their abilities and needs in existing work practices. As designers of tomorrow's technology, we have the - sponsibility of creating computer artifacts that would permit better user experience with the various computing devices, so that users may enjoy more satisfying expe- ences with information and communications technologies.

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Keynote.- The Power and the Puzzles of Auditory Interfaces.- Specification and Modeling.- Improving the Search for User Interface Design Patterns through Typed Relationships.- Contributions of Psychology to the Design of Diagnostic Decision Support Systems.- A Composite Task Meta-model as a Reference Model.- Future Dining Table: Dish Recommendation Based on Dining Activity Recognition.- User-Centered Development.- Developing a User-Centered Mobile Service Interface Based on a Cognitive Model of Attention Allocation.- Structured Digital Storytelling for Eliciting Software Requirements in the ICT4D Domain.- Experiencing User-Centered Design (UCD) Practice (Case Study: Interactive Route Navigation Map of Bangkok Underground and Sky Train).- Development of Wearable Device by Kid's Friendly Design for Kid's Safety.- Usable Systems.- Towards a Usability Coaching Method for Institutionalizing Usability in Organisations.- The Focus on Usability in Testing Practices in Industry.- Added Value of Eye Tracking in Usability Studies: Expert and Non-expert Participants.- Supporting the Spreadsheet Idea for Interactive Database Applications.- Social and Cultural Problems.- What Is Culture? Toward Common Understandings of Culture in HCI.- Personalized Support, Guidance, and Feedback by Embedded Assessment and Reasoning: What We Can Learn from Educational Computer Games.- Investigating Sociability and Affective Responses of Elderly Users through Digitally-Mediated Exercises: A Case of the Nintendo Wii.- Acquaintances Clustering for Social Relationship-Based Indexing of Digital Photos.- Mobile and Web Applications.- Generating Exploratory Search Interfaces for the Semantic Web.- Can Adaptive Interfaces Improve the Usability of Mobile Applications?.- Video Game Design for Mobile Phones.- Epistemology, Emotions and Personalization.- EPISOSE: An Epistemology-Based Social Search Framework for Exploratory Information Seeking.- Artificial Emotion Generation Based on Personality, Mood, and Emotion for Life-Like Facial Expressions of Robots.- Human Error Categorization: An Extension to Classical Proposals Applied to Electrical Systems Operations.- Exploring the Influence of Cultural Diversity in Collaborative Design Teams: Preliminary Findings.- Theoretical Model of User Acceptance: In the View of Measuring Success in Web Personalization.- Posters.- An Approach to Information Presentation Employing Game Principles and Physics Based Interaction.- Exploration in 3D Multimodal Virtual Environment for Nonvisual Spatial Recognition.- Experiments with Adaptable Interfaces for Elderly People.- The Practice of Interaction Design.- Artefacts as a Cultural and Collaborative Probe in Interaction Design.- An Easy to Use Augmented Reality Authoring Tool for Use in Examination Purpose.- From Microsoft Word 2003 to Microsoft Word 2007: Design Heuristics, Design Flaws and Lessons Learnt.- The Effect of Age, Gender, and Previous Gaming Experience on Game Play Performance.- New Attitude to Learning in Virtual Environments - Mining Physiological Data for Automated Feedback.- Personalized Sightseeing Tours Support Using Mobile Devices.- Reaction on a Change of User Context in Complex Mobile User Adaptive System.- Augmented Reality for Deaf Students: Can Mobile Devices Make It Possible?.