
Two years ago Jobs underwent transplant a new liver. In 2004, he was suffering from pancreatic cancer. Apple's announcement this month did not explain how long it will take a leave of absence or the reasons behind his decision.
Apple reported the highest revenue in the last three months of last year. But the health of Steve Jobs always invite questions about the future of the company.
He helped pioneer Apple computer in 1976. Currently, the company plays an important role in the personal computer revolution calls itself Apple. A variety of Apple products including iPod and iPhone and a successful new product, iPad tablet computer.
Steve Jobs has long been a symbol of Apple for the public. However, some people may forget that he came out in 1985 to build a computer company called NeXT.
Manuel Perez-Quinones, professor of computer science at Virginia Tech. say, Apple led the development of a number of technologies, but that only tells part of his success. For example, he said many technological developments associated with Apple actually comes from NeXT.
Manuel said, "The environment of software development, programming languages, some library-related are the various things associated with Steve Jobs from scratch. But that does not mean coming from Apple. It comes from NeXT. "
Apple bought NeXT in 1996. Jobs joined together with Apple and became permanent CEO in 2000.
Last May, Apple beat Microsoft in the market value and become the most high-value technology companies in the world.
Jobs said he would remain as chief executive and was instrumental in many major decisions during cutinya. But he put Tim Cook, director of operations, to manage day-to-day operational management.