Introduced in 1985 by the Xtree Company, it was the first program to help DOS users manage hard disks by providing a hierarchical display of directories. Versions for Windows came later, and XtreeGold added file viewers.
"XTree." YourDictionary, n.d. Web. 15 May 2018. <http://www.yourdictionary.com/xtree>.
XTree. (n.d.). Retrieved May 15th, 2018, from http://www.yourdictionary.com/xtree