signs

There are three official signs posted outside of computer labs at Purdue over the course of any given day: Class in session, Open, and Closed. Notably, the “Class in session sign” is yellow, while the “Open” sign is green and the “Closed” sign is red. The visual rhetoric of these placards suggests that one can “proceed with caution” into the room, even if a class is meeting and that it is only truly closed when the door is actually locked by ITaP (Information Technology at Purdue).