It may be an internal or external device. See DVD drives, DVD-R, DVD-RW, DVD+R and DVD+RW. (2) A stand-alone DVD player for TV viewing that also records DVDs on blank DVD-R discs or DVD+R discs.

Professional spectrometers cost many thousands of dollars, but you can build your own using a simple USB web cam, an old DVD-R, and a VHS cassette case. In this tutorial of Public Labs’ DIY ...

See portable DVD player. In addition to DVD movies and music CDs, DVD players typically support "plus" and "minus" formats (read-only DVD+R and DVD-R and rewritable DVD+RW and DVD-RW); however ...