Apple is unveiling new artificial intelligence features at its annual developers conference. The World Wide Developers Conference started Monday. It's the last one featuring CEO Tim Cook before he turns his post over to John Ternus in September. The conference attracts thousands of developers from some 65 countries to Apple's Silicon Valley headquarters. It usually focuses on software, in contrast to the fall unveiling of the latest iPhones. Apple showed off updates on new AI features, including upgrades to its Siri assistant. Apple says it's focusing on day-to-day use and privacy.