DV stands for Digital Video - video captured to a PC from a digital camcorder.
There are two methods of storing DV video data, that is, type-1 and type-2. Both are stored usually in AVI files.
Related software: DVD Ripper, Video Converter, Media Converter

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.
Related software: DVD Ripper, Ripper Pack Platinum, DVD to Flash Converter

DVD-R - DVD+Recordable define a standard for recordable DVD drives and media defined by the DVDRW Alliance. Often called "plus R", the format is writing once (compared to DVD+RW which can be erased and rewritten). The single sided discs can hold 4,700,000,000 bytes (4.38 Gigabytes at 1024 bytes to the kilobyte) with double sided discs holding twice as much.
Related software: DVD Ripper, DVD to Flash Converter

DVD-10 is a double sided single layer DVD. Video DVD, DVD-R/W and DVD+R/W support this format. Effectively this means that DVD-10 is a dual-sided DVD-5 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 DVD-9 discs in hope that they could copy their dual-layer discs directly to blank discs.
Related software: DVD Ripper, DVD to Flash Converter

DVD-18 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 DVD-18 is basicly four pressed plastic DVD-5s pressed together, they are not burned).
Related software: DVD Ripper, DVD to Flash Converter

DVD-5 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) . Often referred to as "single sided, single layer".
Related software: DVD Ripper, DVD to Flash Converter

DVD-9 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 DVD-9 is basicly two pressed plastic DVD-5s pressed together, they are not burned).
Related software: DVD Ripper, DVD to Flash Converter

DVD-Audio is music disc, aimed to replace regular audio CD within next few years. DVD-Audio disc can contain 4 - 18 GBs of data, depending on how many layers and sides of the disc are used. Regular DVD-Audio disc contains various copy-protection methods and obviously the audio data itself -- audio can be stored in various formats, including uncompressed (L)PCM format (in frequencies from 44.1kHz upto 192kHz) with bitrates as high as 9.8Mbit/sec. Other formats allowed include Dolby Digital 5.1, MPEG-1 (stereo, audio layers II and III), MPEG-2 (multichannel), DTS and SDDS.
Related software: DVD Ripper, DVD Audio Ripper

CSS stands for Content Scrambling System.
In DVD-Video, an encryption scheme designed to protect copyrighted material that resides on a disc by periodically scrambling the data using encryption keys.
Related software: DVD Ripper, DVD to Flash Converter

On a DVD disc, DVD movie files are stored in the VIDEO_TS folder. There is also an AUDIO_TS folder, this is where DVD-Audio would be stored, but usually the folder is empty.
Related software: DVD Ripper, DVD to Flash Converter

If you look at the files on a DVD, you will notice that most DVDs have both a VIDEO_TS and AUDIO_TS folder, but the AUDIO_TS folder is usually empty. DVD-Audio would be stored in an AUDIO_TS folder but is a separate format to DVD-Video.
Related software: DVD Ripper, DVD Audio Ripper

VOB stands for DVD Video Object.
The VOB file is one of the core files found on DVD-Video discs and contains multiplexed Dolby Digital audio (normally AC3 format) and MPEG-2 video. VOB files on a DVD are numbered as follows: vts_XX_y.vob where XX represents the title and Y the part of the title. There can be 99 titles and 10 parts, although vts_XX_0.vob does not contain any video, usually just menu or navigational information. You can find them on a DVD video disc in a subdirectory labelled VIDEO_TS.
Related software: DVD Ripper, Video Converter, Media Converter

IFO is a DVD information file that stores information about Chapters, Subtitles and Audio Tracks. An IFO file is one of three types of files that are used on DVDs. It contains important navigational information, such as where a video chapter begins, and where audio and subtitle streams exist within the movie (VOB) file. IFO files are not encrypted.
Related software: DVD Ripper, Ripper Pack Platinum

ISO refers also to a CD or DVD image (not picture.) file with an extension of ".iso". The extension comes from the full name of the CD-ROM and DVD-ROM file system specification, ISO 9660. Just like other CD/DVD image formats, ISO is a file that contains full content of the disc, including every single track, directory, file and information about the structure of the disc. Normally ISO files are being used to replicate existing CD/DVD discs, transfer those discs over the network to other location (or to other person) and burn back to CD/DVD which then would be an identical replica of the original disc.
Related software: DVD Ripper, Ripper Pack Platinum

VCD stands for Video Compact Disc.
VCD is a standard developed in early 1990's that allows regular CD to contain 74 minutes of video and audio. Both, video and audio, are encoded in MPEG1 format and stored on the CD in specific format. A VCD can be played on almost all standalone DVD Players and of course on all computers with a DVD-ROM or CD-ROM driver with the help of a software based decoder/player.

SVCD stands for Super Video Compact Disc (called also SuperVCD or Chaoji VCD). SVCD is the successor of VCD.

XVCD stands for eXtended VCD.
XVCD has same features as VCD but it is possible to use higher resolution and higher bitrates to get higher video quality. XVCD burned in "VCD" Mode on a CD-R or CD-RW can be played on some hardware VCD or DVD players and many computers with appropriate software.

VHS stands for Vertical Helix Scan.
VHS is the video casette format and technology introduced by JVC in 1976. It is an analog format capable of delivering 240 lines of video resolution, along with stereo sound that's nearly as good as CD. Blank tapes usually feature either 120 minutes or 160 minutes of recording time at the highest recording speed (6 hours or 8 hours at the slowest speed).

SVHS stands for SuperVHS.
SVHS is an improved, high-resolution VHS standard developed by JVC to offer better video quality than the VHS format. SVHS recording can't be played back correctly with VHS videos, unless VHS VCR has something called "super quality playback" that allows playing SVHS tapes.

DVHS is a digital recording and playback format for High Definition material. It's based on the existing 1/2" VHS-sized cassettes.

CD-DA stands for compact disc digital audio.
It is the original music CD format storing digital PCM data. Defined by the Red Book standard.

CDA stands for CD Audio.
You can play .cda files only from a CD-ROM. The tracks however, can be ripped to your HDD as a digital audio format like WAV, wma, or MP3 files.

DAT is used to refer to a certain tape backup format. These DAT files are basically MPEG-1 files with an additional information and certain specific file structure -- they are NOT "real" MPEG-1 files and you need to convert them back to "real" MPEG-1 files in order to edit them even that most of the software players treat them as regular MPEG-1 files.
Related software: DVD Ripper, DVD to Flash Converter

DTS stand for Digital Theater Systems Digital Sound and is a product of DTS, Inc.,
DTS is a multichannel audio compression format similar to Dolby Digital/AC3 used in DVD-video discs, DVD-audio, 5.1 channel audio CDs, and some movie theaters. DTS differs from Dolby Digital in that it generally uses higher data rates and many have the opinion that DTS is better quality. DTS can only be on a DVD-video disc if accompanied by a Dolby Digital or LPCM track (for North America ) or mpeg audio and LPCM (European Community) to ensure compatibility, because DVD players are only required to decode those standards in those regions.