4.0

4.0 may refer to: 4 (disambiguation) 4.0 (Mónica Naranjo album), a 2014 compilation album by Spanish recording singer-songwriter Mónica Naranjo LP Underground 4.0, a 2004 CD and digital download set by Linkin Park Underground Live Free or Die Hard, a 2007 American action thriller film (released as Die Hard 4.0 outside North America)