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The democratization of design knowledge is at the very heart of our mission. That’s why—over 19 years after we started—we will never stop bringing leading designers, bestselling authors, and Ivy League professors together to create open-source, free-to-access textbooks on UX design. This is the world’s most comprehensive compendium of design knowledge, made available to everyone around the world.

The Encyclopedia of Human-Computer Interaction, 2nd Ed.

The Encyclopedia of Human-Computer Interaction, 2nd Ed.

Free textbooks written by more than 100 leading designers, bestselling authors, and Ivy League professors. We have assembled our textbooks in a gigantic encyclopedia, whose 4,000+ pages cover the design of interactive products and services such as websites, household objects, smartphones, computer software, aircraft cockpits, and what have you. Name an item of design interest, and you'll probably find it discussed inside.

Table of Contents

Research Bibliography

Browse the world’s largest Wiki Bibliography on human-centered technology, comprising 138,000 authors in more than 127,000 publications.

Latest UX Design Articles

UX Daily is the world’s largest free online resource on UX Design, with new articles published every day.

Contributing Authors

We are honored to have these highly regarded professors and experts as contributing authors of our educational materials:

Don Norman
Don Norman Director of The Design Lab at the University of California

Don Norman is widely regarded as the creator of the term “UX design.” An expert in design, usability, and cognitive science, Norman strongly advocated for user-centered design, which now underpins almost all design fields. His ideas on aesthetics, affordances, and usability profoundly impact the way we design everything, from doors to software applications.

In 1993, he joined Apple as a User Experience Architect—the first-ever use of the phrase “user experience” in a job title. Norman’s books, The Design of Everyday Things and Emotional Design, are regarded as essential readings for any design student. He is currently director of The Design Lab at the University of California, San Diego, and is also co-founder of the Nielsen Norman Group.

Don Norman is the author of numerous books including "Emotional Design," and more recently, "Living with Complexity." He is co-founder of the Nielsen Norman group, a professor at KAIST (in Korea), an IDEO fellow, and a design theorist, studying the fundamentals of modern design.

Donald A. Norman has a Bachelor of Science in Electrical Engineering from MIT and a Doctor of Philosophy in Psychology from the University of Pennsylvania. He also holds an honorary degree from the University of Padua, Italy. He has been a professor of Computer Science (at Northwestern University), Psychology, and Cognitive Science (at the University of California, San Diego).


Lene Nielsen
Lene Nielsen

Lene Nielsen is an Associate Professor at ITU, Department of Business IT, and Head of the TIME (Technology, Innovation, Management, and Entrepreneurship) research group.

Her research focuses on personas, and she was the first in the world to write a Ph.D. about personas. Her research topics include the many aspects of the development and use of personas, such as:

  • Global personas

  • Personas based on quantitative data

  • Persona descriptions as communication to specific and different audiences

  • The relationship between persona description and data

  • The use of personas in agile development

  • Personas in service design.

Lene Nielsen har published two books on personas and more than 80 papers

Lene Nielsen teaches service design and different aspects of innovation.


Frank Spillers
Frank Spillers MS

Frank Spillers is a web and software usability expert, a distinguished speaker, author, and internationally respected Senior Usability practitioner. He is an expert in improving the design and usability of large-scale websites, web applications, desktop, and mobile apps. He is the founder of the usability consultancy firm Experience Dynamics. With an MSc in Cognitive Science and eleven years of experience in UX design, Spillers has worked with clients such as Hewlett-Packard, Intel, and Microsoft. He is an experienced practitioner of user-centered and emotional design and has developed a new research technique called “cognitive archeology,” which aids experts when researching emotional product design.

Before founding Experience Dynamics in 2001, Frank managed usability consulting for WebCriteria (now Coremetrics) and worked with students of Dr. Donald Norman (the grandfather of User-Centered Design) at Intuitive Design, a San Diego-based User-Centered Design consultancy. His current clients include Microsoft, Intel, IBM, Logitech, GE, Nike, Hewlett-Packard, KeyBank, Four Seasons, Chase, Target.com, and Whitepages.com. He has trained thousands of teams and individuals in usability and User-Centered Design techniques in private as well as public settings.

Frank received his Master's in Cognitive Science (MS) from Birmingham University, the UK in the user experience of collaborative (social) virtual (3D) environments.


Dianne Cyr
Dianne Cyr Professor

Dr. Dianne Cyr is a Professor in the Beedie School of Business at Simon Fraser University in Vancouver. She is the author of 4 books and over 100 research articles, book chapters, or proceedings. Dr. Cyr has received numerous awards including Best paper for 2009 in the top-ranked MISQ journal.

Her background is varied and interdisciplinary. Both their Bachelor's and Masters's degrees are in Psychology, and she worked in clinical psychology for the better part of a decade before returning to university to embark on doctoral studies. The earlier training held her in good stead for my Ph.D. research which was focused on the linkage of strategy and human resource management in international joint ventures. She is currently at Simon Fraser University as a Full Professor with tenure in Management Information Systems.

Since 1994 her primary role has been as a university professor, coupled with activities in the business world. She joined Simon Fraser University (SFU) in 1994 as an Adjunct Professor, and carried a very full teaching load (of up to 8 courses in some years), while at the same time conducting research, publishing, and organizing a consulting practice. An opportunity arose for full-time academic employment at the start-up Technical University of British Columbia (TechBC) in 1998. As one of the founding faculty, she was involved in numerous activities to shape the mission, curriculum and structures for TechBC. More specifically, she developed the Management and Technology program until the closure of the university in 2002. At this time, TechBC was merged into SFU, and another academic chapter began.

As the President of Global Alliance Management (1993-2004), she provided consulting and training services in the area of joint ventures and strategic alliances to small and mid-sized companies. During this time she made numerous public presentations on the topic of joint ventures or alliances and developed a program in alliances for the British Columbia Trade Development Corporation. As a Director of Canada Sri Lanka Capital Corporation (1994-2003), she was involved in the development of an agro-industrial joint venture in Sri Lanka.


Clarisse Sieckenius de Souza
Clarisse Sieckenius de Souza Professor

Clarisse Sieckenius de Souza is Full Professor of Computer Science at the Departamento de Informática, PUC-Rio, where she has also served as the director of the Graduate Studies Program for two terms (2003-2005 and 2007-2009). In 2010, Clarisse was a co-winner of the prestigious ACM SIGDOC Rigo Award (see pictures and more on SERG Website).

In 1996 she founded SERG (the Semiotic Engineering Research Group). Among the 15 M.Sc. and 19 Ph.D. students that she has (co-)supervised, more than half are faculty in various Brazilian universities and nearly one-third work in the industry.

In 2005 she published her first book, The Semiotic Engineering of Human-Computer Interaction (The MIT Press). Her second book, Semiotic Engineering Methods for Scientific Research in HCI, co-authored by Carla Leitão, was published in 2009, in Morgan & Claypool's Synthesis Lectures Series.


Alan Dix
Alan Dix Professor

Alan Dix is a computing professor at the Human-Computer Interaction (HCI) Centre of the University of Birmingham, UK. He is a co-author of the global, bestselling university-level textbook Human-Computer Interaction. Dix is passionate about designing things that connect humans and computers—everything from machines to software. He has co-authored and published hundreds of papers on HCI, covering topics ranging from information visualization and usability to designing for appropriation.

Alan Dix has taught and researched human-computer interaction (HCI) for nearly 30 years. His interests in the area range from the application of formal techniques in interface design to methods for enhancing innovation and creativity. He began as a mathematician at Cambridge University and moved into computing and HCI whilst doing his Ph.D. at the University of York. His background also includes work on farm crop sprayers and remote-controlled submarines. He was one of the founder-director of two Internet dot.com companies.


We only invite contributions from globally recognized authorities within their respective design fields.

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