UPDATES: This is a developing story.
9:40 a.m. PDT (12:40 p.m. EDT)
Apple’s penchant for secrecy extends to the agenda for its annual gathering of app developers this week.
The Worldwide Developers Conference in San Francisco begins with a keynote. Apple isn’t saying anything ahead of time, though it’s widely expected the company will unveil updates to its mobile and Mac operating systems, along with a new music service.
For now, sessions for the rest of the week have mysterious titles such as “Pins and needles,” ”Patience is a virtue” and “You’ll be talking about this one.” Another goes by “Hmmmm.” and yet another is “Surprise!” Apple says details will be posted after the keynote.
The conference runs through Friday at the Moscone convention center in San Francisco.
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9:25 a.m. PDT (12:25 p.m. EDT)
Apple isn’t the only company to be previewing its plans for this fall.
Nearly two weeks ago, Google held its annual I/O conference for app developers. It’s similar to Apple’s Worldwide Developers Conference in that it gives Google the stage for showcasing upcoming features and products.
Google unveiled a mobile payment system called Android Pay to rival Apple Pay and an upcoming service from Samsung. Google also says its Google Now virtual assistant will get better in bringing information users might want based on context, such as the song they are listening to or the article they are reading.
The next version of the Android operating system doesn’t have a name yet. It’s known for now as M, as Google names systems after desserts in alphabetical order.
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9 a.m. PDT (noon EDT)
Crowds are starting to form outside San Francisco’s Moscone convention center ahead of Apple’s annual gathering for app developers. Apple uses the Worldwide Developers Conference to preview new features for Macs, iPhones and other devices.
Apple is expected to announce a new music-subscription service incorporating a similar service from Beats, which Apple bought last year for $3 billion.
Apple also might announce new tools for Apple Watch. Apple has said software developers will be able to design apps specifically for the watch this year. For now, all third-party watch apps are dependent on a companion iPhone.
The two-hour keynote begins at 10 a.m. PT.
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AP Technology writers Anick Jesdanun, Ryan Nakashima and Brandon Bailey are contributing to this report.

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