Copyright is a set of laws designed to protect original works of authorship in a tangible form of expression. These laws offer copyright owners' protection over how their work is reused. For details, see this document from the U.S. Copyright office. Please see our Copyright guide.
Public domain refers to works whose intellectual property rights have expired, have been forfeited, have been waived, or ar inapplicable. For example, works of Shakespeare or Beethoven were created before copyright existed. Some works such as cooking recipes, instructions, standard calendars, measurements, and telephone books which contain no original authorship are not eligible for copyright protection. Be sure and check carefully to determine that
Other Public Domain works:

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