Object Lessons is a series of short, beautifully designed books about the hidden lives of ordinary things. "OK" as a word accepts proposals, describes the world as satisfactory (but not good), provides conversational momentum, or even agrees (or disagrees). OK as an object, however, tells a story of how technology writes itself into language, permanently altering communication.

OK is a young word, less than 200 years old. It began as an acronym for "all correct" when the steam-powered printing press pushed newspapers into the mainstream. Today it is spoken and written by nearly everyone in the world.