This article stated that Newton PDA is Steve Jobs' failure ("most notorious failure, the Newton"), is totally wrong.
According to wikipedia, Newton development started at 1989 (Jobs already left Apple at that time), Apple CEO John Sculley is back behind the project. If you know Apple history well, Sculley was invited by Steve Jobs to join Apple, while he was a president of Pepsi Cola.
That is a legendary quote, Jobs ask Sculley, "Do you want to spend the rest of your life selling sugared water or do you want a chance to change the world?". It was the year 1983, Sculley join Apple.
Sculley and Jobs has conflicts on Apple's management, force Jobs to leave the Apple Computer in 1985. Sculley leave Apple in 1993, Jobs came back to Apple in 1997 after Apple bought over the NeXT Computer.
The Newton development was stop at 1998, the year after Steve Jobs came back to Apple again.