A digital on-screen graphic (originally known as digitally originated graphic, and known in the UK and New Zealand by the acronym DOG; in the US, Canada and Australia  as a bug) is a watermark-like station logo that most television broadcasters overlay over a portion of the screen area of their programs to identify the channel. They are thus a form of permanent visual station identification, increasing brand recognition and asserting ownership of the video signal. In some cases, the graphic also shows the name of the current program. Some television networks use an on-screen graphic to advertise upcoming programs (usually programs scheduled later the same day, but also for "significant" upcoming programs as much as a week in advance).