Ephemera (singular: ephemeron) is any transitory written or printed matter not meant to be retained or preserved. The word derives from the Greek, meaning things lasting no more than a day. Some collectible ephemera are advertising trade cards, airsickness bags, bookmarks, catalogues, greeting cards, letters, pamphlets, postcards, posters, prospectuses, stock certificates, tickets and zines. Decks of personality identification playing cards from the war in Iraq are a somewhat recent example.
Further information on the Wikipedia page .
Ephemera of various kinds can be used for various local history purposes.
See also Ephemera Societies