I've been looking into making a Video On Demand platform, sort of like the new IPlayer..  But make it skinnable so I could sell it on to new clients - While I was doing a bit of investigation, I came across so many acronyms which I had no clue about.. After a few headaches I found this great list

ADSL
Asymmetric Digital Subscriber Line is a technology used to convert an existing telephone network into a broadband network. ADSL typically delivers 500Kb/s - 1Mb/s, but up to 6Mb/s is possible.

Broadband TV
TV services delivered over broadband networks - basically the same as IPTV.

Digital Video Recorder (DVR)
Also known as PVR (Personal Video Recorder), a DVR is a Set Top Box that contains hard disk storage to allow a viewer to record content. Usually the DVR can be programmed in advance to record programmes in the future and set to always record particular series. In some cases DVRs have intelligent features so they can be set to record content of a particular genre favoured by the user or containing particular actors, for example.

DTH
DTH means Direct to Home and refers to satellite TV services where a viewer must have a satellite dish and receiver installed at their home to watch the service.

DVB
DVB means Digital Video Broadcasting a series of transmission standards for broadcast of digital content. www.dvb.org

DVB-T
DVB-T is the standard used for broadcasting on Digital Terrestrial networks.

DVB-H
A new standard developed by the DVB organisation for broadcast to handheld devices like mobile phones.

DVB-S
DVB-S is a standard used for broadcasting on satellite networks.

Free Video on Demand (FOD)
Free Video on Demand is a service where a viewer can select VOD content to view but does not have to pay any additional fee other than the access or basic subscription fee they pay for TV services. FOD is often used by operators to encourage viewers to try out VOD.

Hollywood Studios
The 8 large film studios based in Los Angeles - 20th Century Fox, CBS Paramount, DreamWorksSKG, MGM, NBC Universal, Sony Pictures, Walt Disney, and Warner Bros. Also known as the Major Studios.

Hotel Pay TV
TV services available to hotel guests in return for payment of a fee. Usually the content offered is blockbuster movies or adult entertainment, but increasingly Hotel Pay TV operators are offering TV series, music, kids and sport content.

IPTV
IPTV is used to refer to TV services that are delivered over IP (Internet Protocol) based networks such as ADSL or fibre. Services include broadcast channels and Video on Demand.

Major Studios
The 8 large film studios based in Los Angeles - 20th Century Fox, CBS Paramount, DreamWorksSKG, MGM, NBC Universal, Sony Pictures, Walt Disney, and Warner Bros. Also known as the Hollywood Studios.

MPA
The Motion Picture Association is an industry alliance between most of the Major Studios (20th Century Fox, CBS Paramount, MGM, NBC Universal, Sony Pictures, Walt Disney, and Warner Bros) focused on their international i.e. non-USA business. www.mpaa.org

MPAA
The Motion Picture Association of America is an industry alliance between most of the Major Studios (20th Century Fox, CBS Paramount, MGM, NBC Universal, Sony Pictures, Walt Disney, and Warner Bros) focused on their "domestic" USA-based business. www.mpaa.org

Near Video on Demand (NVOD)
Near Video on Demand is a Pay per View service where the same content (typically movies) is broadcast on several channels at the same time with staggered start times of every 15 or 30 minutes.

Network PVR
A Network PVR offers viewers the same functionality as a PVR but the storage space is located on a large server in the network rather that in the user's home. The storage can be for individual users but in some cases content is automatically recorded and made available to all users.

Pay per View (PPV)
Pay per View is a service where a viewer can chose to watch certain content in return for payment of a one-off fee. The content is broadcast so the viewer has to wait until the next start time to watch the content, and has no VCR style controls.

Personal Video Recorder (PVR)
Also known as DVR (Digital Video Recorder), a Personal Video Recorder is a Set Top Box that contains hard disk storage to allow a viewer to record content. Usually the PVR can be programmed in advance to record programmes in the future and set to always record particular series. In some cases PVRs have intelligent features so they can be set to record content of a particular genre favoured by the user or containing particular actors, for example.

Subscription Video on Demand (SVOD)
Subscription Video on Demand is a service where a viewer can select VOD content to view in return for payment of a monthly subscription fee.

VDSL
Very-high-data-rate Digital Subscriber Line is a technology used to convert an existing telephone network into a broadband network offering connection speeds higher that ADSL, up to 52Mb/s.

Video on Demand (VOD)
Video on Demand is a service where a viewer can select content (movies, tv programmes etc.) stored on a server whenever they want and can watch the content with VCR style controls (pause, fast forward, rewind etc.). The server is not located in their home, but they access it via a high speed network connection like cable or ADSL.

VOD can be delivered to a Set Top Box (STB) connected to a viewer's TV set or to a PC. A viewer usually pays a fee to access each piece of content - other types of charging include subscription-based services (SVOD) and services where there is no charge Free VOD (FOD).

xDSL
A term for all types of Digital Subscriber Line technology used to convert an existing telephone network into a broadband network e.g. ADLS and VDSL.