Intellectual property
property that results from original creative thought,  Art, books, inventions, magazines, movies, music, performances, reports, software, stories, and trademarks are some examples.

Piracy

The theft of intellectual property, stealing what does not belong to you.  Also known as bootlegging or copying.

http://www.uspto.gov/web/offices/ac/ahrpa/opa/kids/kidantipiracy04.htmjavascript:mctmp(0);


Anti-piracy campaign
Source
No matter what you are downloading, piracy is illeagal
http://blogs.shu.edu/piracy/