"She said to me, 'You can do it under one condition: That you never cross that line again, '" Armstrong recalled.

NPR: Armstrong Turns Emotional In 2nd Part Of Interview

"That is a valuable thing, because usually when you go back and try to find that sort of thing again, you can't do it, " he says.

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And, if you're feeling really frisky, you can pull a window and snap it into place so that it takes up half the screen -- again, similar to what you can do in Windows 7.

ENGADGET: Chrome OS review (version 19)