This Urban Technology studio teaches students to generate new understandings of urban systems as experienced by humans. Through the creation of “proprietary data,” students develop a unique take on the affordances, use, and misuse of physical and digital infrastructures. This project investigates the presence and distribution of mailboxes in downtown Ann Arbor, identifying and classifying their count, type, location, and density. It also explores the reasoning behind the placement or removal of mailboxes, considering the broader context of postal service usage and mailboxes’ significance as a type of civic infrastructure.