The Siemens Corporation needed software interface icons for their Windows application product which controls HVAC for large office building or arrays of buildings. Design Design read through pages of descriptors about the function and meaning of each before illustrating and executing over 80 different icons. The challenge was then to make sure each icon worked at a 48-pixel size as well as reducing down to the elusive 16 pixel toolbar miniature. All the icons were produced as .eps files as well as Windows .ico files. (Yes, we are all Mac, so that was a bit tricky.) But, that was the final step, with many hours of work to do and approvals to get before we were ready for that final step. Read through the captions of each frame for the project study notes.