Analog Protection System

The Analog Protection System (APS), also known as Copyguard by some people, is a videocassette and videodisc copy protection system originally developed by Macrovision Corporation. The system was developed to prevent bootlegging of original videocassettes and videodiscs.

List of Customers

 * 20th Century Fox Home Entertainment (VHS: 1986-1998, 2004-2006; DVD: 1998-2020)
 * AIX Media Group
 * Artisan Entertainment (mainly on DVD releases and on a few blockbuster VHS releases in the 1990s)
 * Bandai Entertainment
 * DreamWorks Home Entertainment (before 2003)
 * FUNimation Entertainment
 * Group Productions
 * Home Vision Entertainment
 * The Lyons Group (1992-1995)
 * Media Home Entertainment (except for Anchor Bay Entertainment-era VHS releases)
 * MGM Home Entertainment (1986-1993)
 * Paramount Home Media Distribution (1990-1993, 1998-2013)
 * Pioneer Entertainment (mainly on DVD releases)
 * PolyGram Video (1997-1999)
 * Price Stern Sloan Video (1992)
 * Sony Pictures Home Entertainment (on some rare occasions on VHS: 1996-1999; DVD: 1997-2003)
 * Sony Wonder (on some 2006 releases)
 * United Learning
 * Universal Pictures Home Entertainment (1986-2007)
 * Viz Video (mainly on DVD releases)
 * Walt Disney Studios Home Entertainment (1986-2014, except a few rare occasions including: all LP-mode releases, some copies of the 1995 VHS of While You Were Sleeping that have no previews, and some mid-'80s short-form releases)
 * Disney Educational Productions
 * Warner Bros. Home Entertainment (1986-1993)
 * HBO Home Entertainment
 * New Line Home Entertainment (on early DVD releases, as well as on the VHS of Teenage Mutant Ninja Turtles II: Secret of the Ooze and on some pre-Time Warner Turner-era VHS releases)
 * Nelson Entertainment (experimental, only during the Embassy years)
 * Zomba Video
 * Jive Records