Before revision: Modularity Modular components made by Samsung and Harman Kardon, (from the bottom) an audio digital receiver, DVD player, and HD TV unit A Sony "midi" hifi from the late 1980s.
After revision: Modularity Modular components made by Samsung and Harman Kardon, (from the bottom) an audio digital receiver, DVD player, and HD TV receiver A Sony "midi" hifi from the late 1980s.