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by AnthonyMouse 4376 days ago
It is a mathematical algorithm. You have e.g. a compression algorithm which takes a compressed photo as input and calculates the pixel color values to use in order to display a picture of a cat on a monitor. It is an algorithm. The algorithm, the software, is not a picture of a cat (or a window with menu bars, or a web page, etc.) The picture of a cat is just the output of the algorithm. People are too easily confused by this.