Uno is an card game developed in 1971 by Merle Robbins in Reading, Ohio, a suburb of Cincinnati. It has been a Mattel brand since 1992. UnoLibrary is an open source Java adaptation of the card game of the same name. See [official site][] and [Wikipedia][]. [official site]: http://www.letsplayuno.com/ "official site of UNO" [Wikipedia]: https://en.wikipedia.org/wiki/Uno_(card_game) "introduction page on Wikipedia"