Steve Jobs left his position as head of Apple

Although the true reasons are unknown for now, everything points to a worsening of his health.

Tim Cook, former director of operations, will be his replacement in the CEO position at Apple.

Steve Jobs remain with the company as chairman of the board.

The previous CEO of Apple , Steve Jobs , announced Wednesday his resignation as head of the company's U.S. technology, a position he will be replaced by Tim Cook , currently head of operations. In the statement, Jobs said would continue in the company has become one of the most influential planet as Chairman of the Board of Directors and already recommended to Tim Cook to replace him as CEO.

"I always said that if the day came that I could not cope with my responsibilities at the head of Apple as CEO, be the first to make it known," Jobs wrote in a letter to the board of the company and Apple community. "Unfortunately, that day has come," he added. Nevertheless, Jobs will remain in the company as chairman of the board.

Jobs was present at the keynote WWDC 2011 in San Francisco. This act marked his second public appearance since in January take an indefinite medical leave. It is unknown reasons that led Jobs to ask the medical leave. Jobs, who has pancreatic cancer survivors in 2004 and in 2009 underwent a liver transplant, has continued active since then in making business decisions . He went to a closed-door meeting with President Barack Obama in February and undertook to introduce the iPhone 2 in March . "I believe the brightest days and innovators from Apple yet to come , "said the letter," and look forward to watching and contributing to that success from a new position. " was photographed in February at the exit of the medical center for sick of cancer, "Stanford Cancer Center" located in Palo Alto, where he was treated the late actor Patrick Swayze, which was set off alarms about the possibility that the CEO suffers a new tumor. Jobs had to retire several months earlier 2009 to address what they called "hormonal imbalance" but later learned that he had undergone a liver transplant in April of that year, at a hospital in Tennessee.

In the first hours after the announcement of the resignation of Jobs, Apple shares fell more than 5% in operations, following the closure of Wall Street.

Tim Cook, the logical choice

"I recommend strongly that running your succession plan and named Tim Cook as CEO of Apple, "he said about the choice to replace him in office.

The board fully confident that Tim is the right person for the job

Cook until now COO of Apple, was the man appointed by Jobs at the forefront of daily operations during their absence since last January. The board immediately accepted the recommendation of Jobs. "The board fully confident that Tim is the right person to be our next CEO, "said Board Director, Art Levinson, in a statement to announce the appointment of Cook. "The 13 years of service from Tim at Apple have been marked by outstanding performance , and he has shown remarkable talent and a solid approach in everything he does, "Levinson said.