Werner Esswein - my professor at university - and Andreas Dietzsch for their help.

Stefan Apelt for creating the web version of the questionnaire. He also managed to keep the web servers running. Good work.

My mom for proofreading the German part of the thesis. Sometimes it's good to be a teacher's son.

Karen Holloway for taking the time to proofread the questionnaire even though she was writing her final exams.

Dany Lowit for proofreading the summary of results.

Michael Zhidovinov, Maher Awad, Harri Jaske, and Juha Savolainen for some interesting discussions about patterns.

Jyrki Aaltonen, Igor Pchenitsyn, my brother, my sister, Michael Zhidovinov, and Maher Awad for testing the questionnaire.

Neil Harrison, Gustavo Rossi, Helge Jensen, Mika Ohtuki, Klaus Marquardt, Vladan Devedzic, Douglas Schmidt, Holger Beck, Martin Dick, Linda Rising, Nicolai Josuttis, Jens Coldewey, Mary Lynn Manns, Jerry Fatcheric, Robert Binder, Eric Y. Theriault, Marschall P. Cline, Colette Rolland, Robert Switzer, Stefan Buennig, and Fernando Lyardet for keeping me motivated, for their advise, for their critisim, or just for informing me that the web pages were down again.

Hannu Mannonen - my manager at Nokia - for giving me some time off; at least sometimes.

The student who took the time to show me the way to the department of architecture's library at Helsinki University of Technology when I was hopelessly lost somewhere in the basement of the main building.

And finally everyone who filled out the questionnaire.