DRM – Digital Restrictions Management – technology to restrict what you can do with media you purchase
AACS – Advanced Access Content System – the DRM infection used for both Blu-ray and HD-DVD
BD+ – an addition to AACS for Blu-ray discs, that provides additional restrictions to what you can do
MMC – Mandatory Managed Copy – a theoretical way for you to make a legal copy of a movie
HDCP – High-bandwith Digital Content Protection – Encryption of data over digital connections
HDMI – High Definition Multimedia Interface – A digital connection found on most new HDTV’s, all HDCP compliant
DVI – Digital Visual Interface – Precursor to HDMI, found on many older HDTV’s. However, many DVI connections are not HDCP compliant, making them worthless for Blu-ray and HD-DVD.
MPAA – Motion Picture Ass. of America – trade organization representing the major movie companies
RIAA – Recording Industry Ass. of America – trade organization representing the major music companies