Bill Gates also predicted that Microsoft will sell 1m copies of Windows NT in the first four months after it is released this summer, but that the time between NT’s introduction and its arrival as the dominant operating system will be as long as three years. We’re not trying to set unrealistic expectations. Now if you come from the Unix world, 1m is a huge number, he said. It’s five times what Sun has ever sold as the most successful Unix vendor. If you come from the world of MS-DOS or Windows, 1m is not that big, because we sell over 1.5m copies of Windows and over 2m copies of MS-DOS every month.