A DVD player is a device that plays DVDs, a type of optical disc. DVD players are common in home cinemas and on personal computers.
Windows 7 is the name of the Microsoft Windows operating system that succeeded Windows Vista. It was released to manufacturing on July 22, 2009, and became generally available on October 22, 2009. Windows 7 was succeeded by Windows 8, which was released to manufacturing on August 1, 2012, and became generally available on October 26, 2012.
Windows 7 includes a DVD player software application.