Apple Computers was a company built from the ground up. Wozniak and Jobs sold many of their valuables to begin production of their computers. Their base of operations was Jobs' family garage, where they successfully created circuit boards for the microcomputer and sold them. Impressed by intial sales, they created the Apple II, the world's first personal computer.
The Apple II handcrafted by Wozniak himself, turned out to be a massive hit, turning Jobs and Wozniak into instant millionaires. The technology was simple yet effective and integrated already existing parts into one computer for the mass market.
After the success of the Apple II, Wozniak sold most of his stock in Apple and took more of a backseat role in the company. He proceeded to help with other innovations including the first Macintosh personal computer. Shortly there after, he left the company and retired from engineering.