DVD stands for Digital Versatile Disc.
DVD is essentially a bigger, faster CD that can hold cinema-like video, better-than-CD audio, and computer data. View DVD Ripper, DVD to MP3 Ripper and DVD Burner.
DVD10 is a double sided single layer DVD. Video DVD, DVD-R/W and DVD+R/W support this format. Effectively this means that DVD10 is a dual-sided DVD5 and can hold 8.75 gigabytes of data with 4.38 gigabytes on each side. Two-sided discs need to be flipped over in order to access the other data side. Unfortunately many blank DVD media advertisers mislead customers to believe that these discs are actually blank DVD9 discs in hope that they could copy their dual-layer discs directly to blank discs.
DVD-10 is a double sided single layer DVD which can fit up to 9.4 GB or 8.7 computer GB. Video DVD, DVD-R/W and DVD+R/W support this format.
DVD18 is a double sided dual layer DVD which can fit up to 17 GB or 15.9 computer GB which some commercial video DVDs are using today (a DVD18 is basicly four pressed plastic DVD5s pressed together, they are not burned). Video DVD supports this format but DVD-R/W and DVD+R/W does not support this format.
DVD5 is a single sided single layer DVD that stores up to about 4.7 GB = 4 700 000 000 bytes and that is 4.38 computer GigaBytes where 1 kilobyte is 1024 bytes(4 700 000 000B/1024 = about 4 589 843KB/1024 = about 4485MB/1024 = about 4.38GB) . Video DVD, DVD-R/W and DVD+R/W supports this format. Often referred to as "single sided, single layer".
DVD9 is a single sided dual layer DVD which can fit up to 8.5 GB or 7.95 computer GB which many commercial video DVDs are using today (a DVD9 is basicly two pressed plastic DVD5s pressed together, they are not burned). Video DVD supports this format but DVD-R/W and DVD+R/W does not support this format.
DVD-9: single sided, double layer, 8.5 GB (7.92 GB)