The PC
It's easy to forget, but Jobs and Apple co-founder Steve Wozniak helped popularize the very idea of the personal computer with the Apple II, a mass-produced 8-bit computer encased in plastic that became one of the most successful PCs of the 1980s. It revolutionized the way people work. Much has happened since -- not least the rise of Windows-based computers -- but Mac sales continue to climb. In fact, Mac sales for the September 2011 quarter are expected to come in between 4.4 million and 4.6 million, a new record.