Apple I
The Apple I was a personal computer designed and built by Steve Wozniak, and marketed by Steve Jobs in 1976. It was the first personal computer to be sold to the public with a keyboard and a monitor, making it a complete system. It was also the first computer to be sold with a ready-to-use operating system, rather than requiring the user to create one themselves.
The Apple I was sold as a bare circuit board, without a case, power supply, or keyboard. It was up to the user to provide these things in order to use the computer. Despite its limitations, the Apple I was successful and laid the foundation for the development of the personal computer industry.