Apple is expected to unveil its cloud-based service iCloud at its Worldwide Developers Conference next week.
Apple said that its chief executive Steve Jobs, who has been on medical leave, will participate in the conference with a keynote speech.
As well as iCloud Apple said it will also reveal the details of its next-generation desktop operating system Mac OS X Lion, as well as the next version of the mobile operating system iOS5 which is used in products including the iPhone and iPad.
Apple shares rose one per cent after the announcement that Jobs would participate in the conference, although it was not clear exactly what role Jobs would play or if he is coming back from medical leave.
An appearance by Jobs, a survivor of pancreatic cancer, would mark one of the few occasions he has appeared in public since his third medical leave in January.
Company executives have said Jobs, who is credited with rescuing Apple from near death in 1996 after a 12-year absence from the company he co-founded, has still been involved in strategic decision-making at Apple during this medical leave.
Under Jobs, the launches of the iPhone and the iPad forged new business lines for the company that created the personal computing category.
Apple typically unveils a new iPhone around this time of year but some sources told Reuters that they did not expect this year's model to appear until September this year.