What is the Full Form of DVD?

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DVD Full Form is Digital Video Disc or Digital Versatile Disc. It is commonly known as Digital Video Disc. It is a digital optical disc    storage format used to store high capacity data like high quality videos and movies. It is also used to store operating system. It was   developed in 1995 by 4 companies namely : Philips, Panasonic, Sony and Toshiba. DVD, also known as "digital versatile disc" or "digital video disc," is an optical disc storage media format. Its main uses are video and data storage. Most DVDs are of the same dimensions as compact discs (CDs) but store more than six times as much data.
All read-only DVD discs, regardless of type, are DVD-ROM discs. This includes replicated, recorded, video, audio, and data DVDs. A DVD with properly formatted and structured video content is a DVD-Video disc. DVDs with properly formatted and structured audio content are DVD-Audio discs. Everything else, (including other types of DVD discs with video content) is referred to as a DVD-Data disc. Consumers use the term "DVD-ROM" to refer to pressed data discs only, but that is incorrect usage; moreover, the term DVD is also applied generically in describing newer video disc formats, Blu-ray Disc and HD DVD. Variations of the term DVD often describe the way data is stored on the discs: DVD-ROM (Read Only Memory), has data that can only be read and not written, DVD-R and DVD+R can record data only once and then function as a DVD-ROM. DVD-RW, DVD+RW and DVD-RAM can both record and erase data multiple times. The wavelength used by standard DVD lasers is 650 nm, and thus the light has a red color. 
DVD movies, players and drives are coded  according to their geographic region. The purpose of the coding is to allow regions to determine when a DVD movie can be released to the public without conflict. The region codes do not apply to DVD-ROM, DVD-Audio and recordable or rewritable DVDs or most dvd players play only a certain region code which corresponds to the dvd's being played. the region code refers to the region where the dvd was meant to be distributed and played. for example, region 1 dvd's are dvd's distributed in the north america and usually cannot be played on dvd player manufactured in asia (for example). When a dvd reads "ALL", this means it can be played on any dvd player. you are probably trying to play foreign dvd's and thus the error message. there are a lot ot "region free" dvd players on the market (look online) and they are usually similar in price to other dvd players.

On the basis of storage capacity, DVD can be divided in 4 types.
  • 4.7 GB (single-sided, single-layer)
  • 8.5–8.7 GB (single-sided, double-layer)
  • 9.4 GB (double-sided, single-layer)
  • 17.08 GB (double-sided, double-layer)

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