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+R is supported by DVD+RW Alliance, which is backed by Sony, Yamaha, Philips, Dell, and JP. The main difference between the two formats lies in the underlying technology which is generally unnoticeable to the end user. DVD-R use LPP (Land Pre Pit) system for tracking and speed control. While DVD+R uses an improved ADIP (ADdress In Pregroove) system which makes the ADIP system more accurate at higher speeds.