DENVER (AP) -- The days of lugging around 500-page playbooks and stacks of DVDs are over for half of the players in the NFL.

Their teams have gone digital, replacing the old-fashioned thick paper playbooks with iPads that put everything from X's and O's to notifications, scouting reports and video cut-ups at their fingertips.

The number of teams using iPads for playbooks and game film has increased this season from two to 14. In the NFC, the Bears, Cardinals, Cowboys, Lions, Packers, Panthers, Redskins and Seahawks are using the tablets as are the Bengals, Broncos, Chargers, Colts, Dolphins and Ravens in the AFC.

Other teams, such as the Chiefs, Titans and Saints, are using iPads for some things but haven't completely abandoned three-ring binders.