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"Copy of a" is a song by American industrial rock band Nine Inch Nails, released as the second single from their eighth studio album, Hesitation Marks (2013). It was originally released as a free digital download on Amazon.com in the United States and the United Kingdom for a limited time starting August 13, 2013. On August 20, the song was made available on the iTunes Store. It was also made available to those who had pre-ordered the album from Nine Inch Nails' official online store, together with "Came Back Haunted" in a zip file labeled "Hesitation Marks Singles".
The song was played live in concert for the first time about two weeks before the official studio track was released. "Copy of a" was featured in the soundtrack to the video game FIFA 14.