DirDir is a pun on its predecessor diri and WikiWiki, and [Dirdir is also the title of a novel](http://www.amazon.com/gp/product/0879974788?ie=UTF8&tag=catv-20&linkCode=as2&camp=1789&creative=390957&creativeASIN=0879974788) by science fiction and literature grand master [Jack Vance](http://www.amazon.com/gp/redirect.html?ie=UTF8&location=http%3A%2F%2Fwww.amazon.com%2Fs%3Fie%3DUTF8%26redirect%3Dtrue%26search-type%3Dss%26index%3Dbooks%26ref%3Dntt%255Fathr%255Fdp%255Fsr%255F1%26field-author%3DJack%2520Vance&tag=catv-20&linkCode=ur2&camp=1789&creative=39095).