The syllable ya at the end of the mantra denotes an offering. Thus the mantra Om Namah Sivaya actually means I offer to Siva a respectful invocation of His Name, and not merely I respectfully invoke His Name. Om Namah Shivaya mantra is sung by devotees in prayers and recited by yogis in meditation.
Short for Short for DVD-Recordable, a recordable DVD format similar to CD-R. A DVD-R can only record data once and then the data becomes permanent on the disc. The disc can not be recorded onto a second time. There also are two additional standards for DVD-R disks: DVD-RG for general use, and DVD-RA for authoring, which is used for mastering DVD video or data and is not typically available to the general public.
DVD+RW must be formatted before recording by a DVD recorder. The rewritable DVD+RW standard was formalized earlier than the non-rewritable DVD+R (the opposite was true with the DVD-formats). Although credit for developing the standard is often attributed to Philips, it was finalized in 1997 by the DVD+RW Alliance.