Steve Jobs back at Apple this month

The big question now among Apple's business partners, investors and fans: Will Mr. Jobs make his reappearance at Apple's annual software developers' conference next week in San Francisco, possibly to unveil a new iPhone?

Mr. Jobs, a survivor of pancreatic cancer, went on medical leave in January. He had earlier exhibited significant weight loss, and cited a nutritional problem related to a hormone imbalance. The unexpected departure, and the few details about Mr. Jobs's ailment, left some investors worried about whether he would return.

Since then, Apple hasn't provided any updates on Mr. Jobs's health.