CARDS GIVE BURSTS OF INFORMATION Cards as an information dissemination medium have been around for a very long time. Imperial China used them in the 9th century for games. Trade cards in 17th century London helped people find businesses. In 18th century Europe footmen of aristocrats used cards to introduce the impending arrival of the distinguished guest. For hundreds of years people have handed around business cards. Cards are a great medium for communicating quick stories.