Diagrams:

So in Patrick's studio we've been doing a lot of diagrams for the spaces we've been surveying. He told us to look for diagrams in everyday life, and I immediately thought of the metro diagram

Each color represents a different train line. You can see where they overlap with other lines and where each stop is in relation to the city. Since looking at a variety of diagrams in class I've encountered them every where. In buildings, on street signs, on maps, describing systems, in explaining assembly, and in public transportation. I can't even imagine life with out them.