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2. Optical disc packaging - Wikipedia

   en.wikipedia.org/wiki/Optical_disc_packaging

   Beginning in 2007, prerecorded Blu-ray and HD DVD titles ship in packages similar to but slightly smaller (18.5 mm shorter and 1 mm thinner: 135 mm × 171.5 mm × 13 mm) [31] than a standard DVD keep case, generally with the format logo prominently displayed in a horizontal stripe across the top of the case (red for HD DVD; and PlayStation 3 ...

3. Keep case - Wikipedia

   en.wikipedia.org/wiki/Keep_case

   Standard black keep case. A keep case or poly-box is a type of packaging, most commonly used with DVDs and Blu-ray videos (and sometimes CDs).. Besides DVD-Video films, keep cases are very common with most disc-based video games since the PlayStation 2, and they are also found on many PC titles and MP3-CD audiobooks (all use discs that are the same basic dimensions as a DVD).

4. Snap case - Wikipedia

   en.wikipedia.org/wiki/Snap_case

   Outside of a DVD snap case. (This would normally feature artwork and text which has been digitally edited out of this photograph.) The inside of the same snap case, with artwork removed. A snap case is a type of optical disc packaging, used for DVDs and CDs, also known as a paperback case, Ivy Hill Snapper, [1] "snapper case", or FLP case.

5. Optical storage - Wikipedia

   en.wikipedia.org/wiki/Optical_storage

   Optical storage refers to a class of data storage systems that use light to read or write data to an underlying optical media.Although a number of optical formats have been used over time, the most common examples are optical disks like the compact disc (CD) and DVD.

6. Optical media preservation - Wikipedia

   en.wikipedia.org/wiki/Optical_Media_Preservation

   The preservation of optical media is essential because it is a resource in libraries, and stores audio, video, and computer data. While optical discs are generally more reliable and durable than older media types, (magnetic tape, LPs and other records) environmental conditions and/or poor handling can result in lost information.

7. Caddy (hardware) - Wikipedia

   en.wikipedia.org/wiki/Caddy_(hardware)

   The PlayStation Portable, UMD disc is a similar concept, using a small proprietary DVD-type disc, in a fixed unopenable caddy as both a copy protection and damage prevention measure. The MiniDisc is a similar concept again, using a small proprietary Magneto-optical type disc instead, also in a fixed unopenable caddy.