A limited edition is normally hand signed and numbered by the artist, typically in pencil, in the form (e.g.): 14/100. The terms special edition, limited edition, and variants such as deluxe edition, or collector's edition, are used as a marketing incentive for various kinds of products, originally published products related to the arts, such as books, prints, video games or recorded music and films, but now including cars, fine wine, and whisky, among other products. A limited edition is restricted in the number of copies produced, although in fact the number may be very low or very high. A special edition implies there is extra material of some kind included.