A number of groups have commented on orphan works, some in formal testimony to Congress, some in press releases and online statements, and others in formal comments to the U.S. Copyright Office as part of their study of the issue in 2005. Several of the groups and their comments are listed below.

Book publishers
Documentarians

Graphic artists and illustrators
Libraries
Movie industry
Museums
Music

Non-profit groups
Photographers

Software / technology groups
Textile

Think tanks

U.S. government