The exhibition is named after a common typeface—courier. Invented in 1955 by Howard Kettler, he initially considered calling it "Messenger," but then, clarifying that the letter "could be an ordinary messenger, or it could be a courier who exudes dignity, prestige, and stability," he settled on "Courier." This is the story of how a postman responds to senders whose letters, unanswered, have been returned to the post office. When writing replies, the postman had to use the courier font to avoid problems with handwriting forgery. Later, courier lost its author and became a computer font.