Illustration of a human-centered design itinerary process for interactive systems.Courtesy of License: Attribution-NonCommercial-ShareAlike 2.0

Illustration of a tool designed to be used by a person. Image: HandAxe.jpg Courtesy of for non-commercial use of BGS copyright material. Copyright: the Natural Environment Research Council (NERC).

Illustration of User-centered history. Based on “Rough History Of User Centered Design Disciplines”. Courtesy of Valola. Published on Oct 08, 2009.

Illustration of a comparison between different types of prototypes. Based on a figure by JAKOB NIELSEN. Courtesy of Uploaded on January 1, 1994. Link:

Discussion on cultural probes booklets (the diary) with the user research participants. Image: Courtesy of Dimitrios Mallios. License: Attribution-NonCommercial

Contextmapping facilitation session with the user research participants for probes analysis. Image: Courtesy of Dimitrios Mallios. License: Attribution-NonCommercial.

Example of personas presentation. Image: Gary Barber. Via Taken on August 2, 2010. License: CC BY-NC-ND 2.0

Illustration of prototype levels. Courtesy of License: Attribution-NonCommercial-ShareAlike 2.0

Xerox Star 8010 Interfaces, high quality polaroids (1981). Courtesy of Creative Commons Attribution-Noncommercial 3.0 License. Link:

Illustration of prototype lifecycle. Courtesy of License: Attribution-NonCommercial-ShareAlike 2.0

Image of buck prototype for interactive tv. "itv-buck". Copyright K. Chorianopoulos.

Image of hi-fidelity (buck) user experience prototype of Kodak. Screenshot from video interview of Mat Hunter for the book "designing interactions". Link:

Usability observation. Courtesy of License: Attribution-NonCommercial-ShareAlike 2.0

Microsoft Windows 1.0 screenshot. "Microsoft Windows 1.0 screenshot" by Rezonansowy, Microsoft - This file was derived from: Microsoft Windows 1.0 page2.jpg, Microsoft Windows 1.0 page3.jpg. This raster graphics image was created with GIMP. Licensed under Public Domain via Wikimedia Commons.

Screenshot of Windows 95. Windows 95 desktop, bundled "Online Services": AOL, AT&T WorldNet, CompuServe, Prodigy. Image: PROScott Schiller. Via Uploaded on February 27, 2014. License: CC BY-NC 2.0

Screenshot of Windows 8.1. Image: Javier Domínguez Ferreiro.Via Uploaded on May 30, 2013. License: CC BY-NC-SA 2.0

Illustration of a stove top designed according to what Don Norman calls "naturally mapped" design. Courtesy of License: Attribution-NonCommercial-ShareAlike 2.0

The typewriter keyboard layout that Dvorak & Dealey patented."KB DSKpatent". Licensed under CC BY-SA 3.0 via Wikipedia -