Don't argue with me. $100k is fair, and you know it

Andy Hertzfeld was inspired to create the Switcher software for Macintosh after witnessing a DOS utility called Memory Shift that allowed rapid switching between multiple applications on John Markoff's IBM PC during a product demonstration in October 1984. Hertzfeld realized he could implement similar multi-tasking functionality for the newly released 512K Macintosh, which had sufficient memory to overcome previous technical limitations.