For more than three decades, Apple Computer was predominantly a manufacturer of personal computers, including the Apple II, Macintosh, and Power Mac lines, but it faced rocky sales and low market share during the 1990s. Jobs, who had been ousted from the company in 1985, returned to Apple in 1997 after his company NeXT was bought by Apple. The following year he became the company's interim CEO, which later became permanent. Jobs subsequently instilled a new corporate philosophy of recognizable products and simple design, starting with the original iMac in 1998.