ABC News: Steve Jobs is such a symbol of Apple, after masterminding the iPhone, iPad, iPod, iMac, and iTunes, that the writer Walter Isaacson planned for a time to call his authorized biography "iSteve." The book eventually got a more sober title (simply "Steve Jobs: A Biography"), and this month its release was moved up to November from next March, but Isaacson's publisher said all that was unrelated to Jobs' health. Now that Jobs has resigned as chief executive officer and become chairman of Apple, the company he co-founded in 1976, Apple watchers wonder how much the company may change. Analysts say his lieutenant, Tim Cook, had been running the company on a day-to-day basis for years anyhow, so they concluded it remains on solid footing -- for now.