LaserDisc (LD) is a home video format and the first commercial optical disc storage medium. Initially licensed, sold, and marketed as MCA DiscoVision (also known as simply "DiscoVision") in North America in 1978, the technology was previously referred to internally as Optical Videodisc System, Reflective Optical Videodisc, Laser Optical Videodisc, and Disco-Vision (with a dash), with the first players referring to the format as "Video Long Play". Later, Pioneer Electronics purchased the majority stake in the format and marketed it as both LaserVision (format name) and LaserDisc (brand name) in 1980, with some releases unofficially referring to the medium as "Laser Videodisc".

Although the format was capable of offering higher-quality video and audio than its consumer rivals, the VHS and Betamax videocassette systems, Laserdisc never managed to gain widespread use in North America, largely owing to high costs for the players and the video titles themselves. It also remained a largely obscure format in Europe and Australia. However, it was much more popular in Japan and in the more affluent regions of South East Asia, such as Hong Kong, Malaysia and Singapore. Laserdisc was the prevalent rental video medium in Hong Kong during the 1990s.