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)
 * Artisan Entertainment (mainly on DVD releases and on the VHS of Total Recall as well as EP mode VHS releases)
 * Bandai Entertainment
 * FUNimation Entertainment
 * HBO Home Entertainment
 * Home Vision Entertainment
 * The Lyons Group
 * Media Home Entertainment
 * MGM Home Entertainment (1986-1995)
 * New Line Home Entertainment
 * Paramount Home Media Distribution (1990-1993, 1998-2013)
 * Pioneer Entertainment
 * PolyGram Video (1997-1999)
 * Sony Pictures Home Entertainment (on some rare occasions on VHS: 1996-1999; DVD: 1997-2003)
 * Universal Pictures Home Entertainment (1986-2007)
 * Viz Video
 * Walt Disney Studios Home Entertainment (1986-2014, except a few rare occasions)
 * Warner Bros. Home Entertainment (1986-1993)