Analog Protection System

The Analog Protection System (APS), also known as Copyguard or Macrovision by some people, is a VHS and DVD copy protection system originally developed by Macrovision Corporation.

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
 * Disney Educational Productions
 * DreamWorks Home Entertainment (before 2002 or 2003)
 * FUNimation Entertainment
 * HBO Home Entertainment
 * Home Vision Entertainment
 * The Lyons Group
 * Media Home Entertainment
 * MGM Home Entertainment (1986-1993)
 * 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 VHS releases)
 * Paramount Home Media Distribution (1990-1993, 1998-2013)
 * Pioneer Entertainment (mainly on DVD releases)
 * PolyGram Video (1997-1999)
 * 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 [the version without previews] of While You Were Sleeping, and some early Walt Disney Mini-Classics releases like Ben and Me)
 * Warner Bros. Home Entertainment (1986-1993)
 * Zomba Video
 * Jive Records