Apple, the most successful smartphone company in the world, was founded in 1976 by Steve Jobs, Steve Wozniak, and Ronald Wayne. The company's first product was the Apple I, a personal computer hand-built by Woz, and followed by the Macintosh in 1984. However, Steve Jobs and John Scully fell out in 1985 when Steve wanted to focus on the Macintosh, leading to an increase in sales for the Apple II. The Macintosh transformed the world’s understanding of what a computer is and led Microsoft to adopt the graphical user interface approach. Apple's product lineup includes five different Mac families, four iPad ranges, three main Series 6 models, and four iPhone Series 3 models. In 2020, Apple began a two-year transition to the final stage of its journey with Macs finally receiving Apple-designed chips.