Usability has become increasingly important as an essential part of the design and development of software and systems for all sectors of society, business, industry, government and education, as well as a topic of research. Today, we can safely say that, in many parts of the world, information technology and communications is or is becoming a central force in revolutionising the way that we all live and how our societies function. IFIP's mission states clearly that it "encourages and assists in the development, exploitation and application of information technology for the benefit of all people". The question that must be considered now is how much attention has been given to the usability of the IT-based systems that we use in our work and daily lives. There is much evidence to indicate that the real interests and needs of people have not yet been embraced in a substantial way by IT decision makers and when developing and implementing the IT systems that shape our lives, both as private individuals and at work. But some headway has been made. Three years ago, the IFIP Technical Committee on Human Computer Interaction (IFIP TC13) gave the subject of usability its top priority for future work in advancing HCI within the international community. This Usability Stream of the IFIP World Computer Congress is a result of this initiative. It provides a showcase on usability involving some practical business solutions and experiences, and some research findings.

INTERACT 2009 was the 12th of a series of INTERACT international c- ferences supported by the IFIP Technical Committee 13 on Human-Computer Interaction. This year,INTERACT washeld in Uppsala (Sweden), organizedby the Swedish Interdisciplinary Interest Group for Human-Computer Interaction (STIMDI) in cooperation with the Department of Information Technology at Uppsala University. Like its predecessors, INTERACT 2009 highlighted, both to the academic and to the industrial world, the importance of the human-computer interaction (HCI) area and its most recent breakthroughs on current applications. Both - perienced HCI researchers and professionals, as well as newcomers to the HCI ?eld, interested in designing or evaluating interactive software, developing new interaction technologies, or investigating overarching theories of HCI, found in INTERACT 2009 a great forum for communication with people of similar int- ests, to encourage collaboration and to learn. INTERACT 2009 had Research and Practice as its special theme. The r- son we selected this theme is that the research within the ?eld has drifted away from the practicalapplicability of its results and that the HCI practice has come to disregard the knowledge and development within the academic community.

INTERACT 2009 was the 12th of a series of INTERACT international c- ferences supported by the IFIP Technical Committee 13 on Human-Computer Interaction. This year,INTERACT washeld in Uppsala (Sweden), organizedby the Swedish Interdisciplinary Interest Group for Human-Computer Interaction (STIMDI) in cooperation with the Department of Information Technology at Uppsala University. Like its predecessors, INTERACT 2009 highlighted, both to the academic and to the industrial world, the importance of the human-computer interaction (HCI) area and its most recent breakthroughs on current applications. Both - perienced HCI researchers and professionals, as well as newcomers to the HCI ?eld, interested in designing or evaluating interactive software, developing new interaction technologies, or investigating overarching theories of HCI, found in INTERACT 2009 a great forum for communication with people of similar int- ests, to encourage collaboration and to learn. INTERACT 2009 had Research and Practice as its special theme. The r- son we selected this theme is that the research within the ?eld has drifted away from the practicalapplicability of its results and that the HCI practice has come to disregard the knowledge and development within the academic community.

Usability has become increasingly important as an essential part of the design and development of software and systems for all sectors of society, business, industry, government and education, as well as a topic of research. Today, we can safely say that, in many parts of the world, information technology and communications is or is becoming a central force in revolutionising the way that we all live and how our societies function. IFIP's mission states clearly that it "encourages and assists in the development, exploitation and application of information technology for the benefit of all people." The question that must be considered now is how much attention has been given to the usability of the IT-based systems that we use in our work and daily lives. There is much evidence to indicate that the real interests and needs of people have not yet been embraced in a substantial way by IT decision makers and when developing and implementing the IT systems that shape our lives, both as private individuals and at work. But some headway has been made. Three years ago, the IFIP Technical Committee on Human Computer Interaction (IFIP TC13) gave the subject of usability its top priority for future work in advancing HCI within the international community. This Usability Stream of the IFIP World Computer Congress is a result of this initiative. It provides a showcase on usability involving some practical business solutions and experiences, and some research findings."

The four-volume set LNCS 9296-9299 constitutes the refereed proceedings of the 15th IFIP TC13 International Conference on Human-Computer Interaction, INTERACT 2015, held in Bamberg, Germany, in September 2015. The 74 full and short papers and 4 organizational overviews, 2 panels, 6 tutorials, and 11 workshops included in the fourth volume are organized in topical sections on tangible and tactile interaction; tools for design; touch and haptic; user and task modelling; visualization; visualization 3D; visualization in virtual spaces; wearable computing; demonstrations; and interactive posters.

The four-volume set LNCS 9296-9299 constitutes the refereed proceedings of the 15th IFIP TC13 International Conference on Human-Computer Interaction, INTERACT 2015, held in Bamberg, Germany, in September 2015. The 41 papers included in the first volume are organized in topical sections on accessibility; accessible interfaces for blind people; accessible interfaces for older adults; affective HCI and emotions and motivational aspects; alternative input; alternative input devices for people with disabilities; interfaces for cognitive support; brain-computer interaction; cognitive factors.

The four-volume set LNCS 9296-9299 constitutes the refereed proceedings of the 15th IFIP TC13 International Conference on Human-Computer Interaction, INTERACT 2015, held in Bamberg, Germany, in September 2015. The 43 papers included in the third volume are organized in topical sections on HCI for global software development; HCI in healthcare; HCI studies; human-robot interaction; interactive tabletops; mobile and ubiquitous interaction; multi-screen visualization and large screens; participatory design; pointing and gesture interaction; and social interaction.

The four-volume set LNCS 9296-9299 constitutes the refereed proceedings of the 15th IFIP TC13 International Conference on Human-Computer Interaction, INTERACT 2015, held in Bamberg, Germany, in September 2015. The 47 papers included in the second volume are organized in topical sections on computer-supported cooperative work and social computing; end-user development; evaluation methods / usability evaluation; eye tracking; gesture interaction; HCI and security; HCI for developing regions and social development; HCI for education.

Die Mensch & Computer ist eine seit dem Jahr 2001 etablierte, jahrlich stattfindende, deutschsprachige Fachtagungsreihe zum Thema interaktive und kooperative Medien. Die Mensch & Computer 2007 steht unter dem Motto "Mensch & Computer: Interaktion im Plural." Im Zentrum steht dabei der Mensch, der beim Arbeiten, Lernen und in seiner Freizeit durch Computer und andere Technologie unterstutzt wird. In einer Welt, in der sowohl der Mensch als auch die Technik immer mehr vernetzt sind, mochten wir an dieser Tagung speziell die Interaktion zwischen einer Mehrzahl oder Vielzahl von Menschen mit und uber eine Mehrzahl oder Vielzahl von Computern in den Vordergrund stellen. Der Band enthalt wissenschaftlicher Beitrage, Design-Prasentationen, System-Demonstrationen und Poster zu folgenden Themen: Konzeption und Entwicklung Evaluation und Experiment Interaktion Kooperatives Arbeiten und Kontext Analyse und Gestaltung multimedialer Systeme Interaktive Systeme fur Kinder Metaphern, Ontologien und Gestaltung Navigation und Prasentation Visualisierung und Darstellung Entwickler-Werkzeuge Kooperation und Allgegenwartigkeit Lernen, Lehren und Erzahlen Zielgruppen sind Forscher und Praktiker im Bereich Mensch-Maschine-Interaktion aus den Bereichen Informatik, Psychologie, Mediengestaltung, Arbeitswissenschaften, Soziologie und Marketing."

Dieses Buch bietet eine breit gefacherte Einfuhrung in die Bereiche Computer Supported Cooperative Work (kurz CSCW "Rechnergestutzte Gruppenarbeit") und Groupware und wendet sich einerseits an Leser aus der Wissenschaft und andererseits an Praktiker unterschiedlicher Bereiche wie Informatik, Soziologie und Psychologie. CSCW dient dazu, soziale Interaktion zu verstehen und technische Systeme (Groupware) zur Unterstutzung der sozialen Interaktion zwischen Benutzern zu entwerfen und zu evaluieren. Dieses Buch will den zweigleisigen Austausch zwischen CSCW-Forschung in der Wissenschaft und der CSCW-Entwicklung in der Praxis unterstutzen."