Today Steve Jobs stepped down as CEO and appointed Tim Cook at CEO. Steve will maintain his role as Chairman of the Board.

Steve posted the following note:

I have always said if there ever came a day when I could no longer meet my duties and expectations as Apple's CEO, I would be the first to let you know. Unfortunately, that day has come.

I hereby resign as CEO of Apple. I would like to serve, if the Board sees fit, as Chairman of the Board, director and Apple employee. 

As far as my successor goes, I strongly recommend that we execute our succession plan and name Tim Cook as CEO of Apple.

I believe Apple's brightest and most innovative days are ahead of it. And I look forward to watching and contributing to its success in a new role. 

I have made some of the best friends of my life at Apple, and I thank you all for the many years of being able to work alongside you. 

Steve