This document compares Macintosh and Windows operating systems. It discusses their origins, with Macintosh tracing back to Douglas Engelbart's idea of a mouse-driven GUI in the 1960s. While Xerox developed early GUIs, Apple released the first mass-market GUI computer with the Macintosh in 1984. Meanwhile, IBM PCs running MS-DOS dominated the market. The document outlines guest speakers from the Macintosh and Windows sides discussing three categories: stability and security, reliability/compatibility/multimedia, and affordability. It concludes both operating systems have strengths and weaknesses, and personal preference dictates which brand is best for each individual.