a copy
Examples
I never leaf through a copy of National Geographic without realizing how lucky we are to live in a society where it is traditional to wear clothes.
Thank you for sending me a copy of your book - I'll waste no time reading it.
A presentation copy...is a copy of a book whoch does not sell, sent you by the author, with his foolish autograph at the beginning of it; for which, if a stranger, he only demands your friendship; if a brother author, he expects from you a book of yours, which does not sell, in return.
I used to carry a copy of Ulysses with me everywhere just in case I was knocked down by a bus. It seemed more important than having clean underwear.
If you buy a DVD you have a copy. If you want a backup copy you buy another one.
Science, like art, is not a copy of nature but a re-creation of her.