Steve Jobs -- the charismatic CEO of Apple Computer and Pixar Animation Studios -- says he's had surgery to remove a cancerous tumor from his pancreas and expects a full recovery. In an e-mail message to employees released by Apple, he says he'll be off recuperating this month and expects to return to work in September. Jobs identified his cancer as an islet cell neuroendocrine tumor. He says it's a rare form that can be cured by surgical removal if diagnosed early. He says his was. Jobs says he's thankful it was not a far more common and deadly form of pancreatic cancer.