[victorbjorklund]

A computer program is just 0s and 1s. Harry Potter books are just raw letters or raw numbers if an ebook.

(The combination is what makes it copyrightable).

[littlestymaar]

In practice it's not the combination that is copyrighted (you cannot claim copyright over a binary just because you zipped it, or over a movie because you re-encoded it, for instance).

It's the “actual creativity” inside. And it is a fuzzy concept.