"The Project Gutenberg Encyclopedia is a reproduction of a 1911 edition of a famous encyclopedia. The text has not been updated. Although the text is in the public domain in the United States, the original publisher still has a valid trademark in the original title of the encyclopedia. The original publisher offered Project Gutenberg a license to use the trademark, but the terms of the license were not consistent with the volunteer noncommercial nature of Project Gutenberg or its primary goal of distributing electronic text with the fewest possible restrictions." -from Gutenberg