Z:gnu-www-ja-who-does-that-server-really-serve--61ac93-Some proprietary operating sys/en

Some proprietary operating systems have a universal back door, permitting someone to remotely install software changes. For instance, Windows has a universal back door with which Microsoft can forcibly change any software on the machine. Nearly all portable phones have them, too. Some proprietary applications also have universal back doors; for instance, the Steam client for GNU/Linux allows the developer to remotely install modified versions.