The Jargon File (version 4.4.7, 29 Dec 2003):
treeware /tree'weir/, n. Printouts, books, and other information media made from pulped dead trees. Compare tree-killer, see documentation.The Free On-line Dictionary of Computing (30 December 2018):
treeware/tree'weir/ Printouts, books, documentation, and other information media made from pulped dead trees by a tree-killer. [Jargon File] (1999-01-15)