In printed or published form, as in You can find this information in print. This usage dates from the late 1400s, almost from the time of the first printing press.
Offered for sale by a publisher, as in The library has a list of all the books in print. The antonym for this usage is out of print, describing material no longer offered for sale by a publisher, as in Most of his books are out of print. [Late 1800s]