Terabytes? Yawn.

Working for a company that makes digital video storage devices (for large scale installations), these numbers are pretty small. We deal in network video recorders that store many terabytes of data on a single unit. In a casino, where several thousand cameras may be streaming high quality video to many rooms full of these recorders, the data storage is quite large. If you considered these installations to be "databases", most casinos would swamp this list.