ACR — Automatic Content Recognition: tech in some smart TVs/apps that identifies what’s on-screen (often via audio/video “fingerprints”) and can report viewing data back to vendors/partners.

VPPA — Video Privacy Protection Act: a U.S. law aimed at limiting disclosure of people’s video-viewing/rental history.

HDCP — High-bandwidth Digital Content Protection: an anti-copy protocol used on HDMI/DisplayPort links to prevent interception/recording of protected video.

DRM — Digital Rights Management: a broad term for technical restrictions controlling how digital media can be accessed, copied, or shared.

MPAA — Motion Picture Association of America: the former name of the main U.S. film-industry trade group (now typically called the MPA, Motion Picture Association).

TV / TVs — Television(s).