Most DVDs use MPEG-2 (H.222/H.262) for high-quality video and audio. DVD authoring software creates directory structure for player compatibility. DVD+R discs are almost universally recognized by most players
Launch Disk Utility from Launchpad. Insert DVD and select "completely" or "quickly" erase. Process takes minutes to an hour depending on deletion type
DVD was developed in 1995 and launched in Japan on November 1, 1996. Initially called "digital video disc" before adopting "digital versatile disc". Computer companies formed technical group to unite MMCD and SD formats
Optical discs store information through surface variations read with light beams. Discs can be reflective or transmissive, storing analog, digital or both. Most common size is 12 cm diameter, thickness about 1.2 mm. Data stored on spiral pattern from innermost to outermost track
Anime adaptation of Yuyuko Takemiya's light novel series. Directed by Tatsuyuki Nagai, produced by J.C.Staff. Broadcast on TV Tokyo from October 2008 to March 2009. Later aired on multiple Japanese TV channels
Optical drives use laser light to read and write data to discs. Drives can read only (ROM), read and write (R/RW), or mixed capabilities. Most modern drives are DVD/Blu-ray, with backward compatibility to CDs