Apple announced a major new foray into streaming music on Monday as it showed off a host of new software features for its iPhones, iPads and Mac computers.The $10-a-month music service is called Apple Music and combines on-demand listening, a 24/7 radio station hosted by live DJs and a forum for artists to give fans behind-the-scenes content from upcoming releases.The service, which was announced during Apple's annual software conference Monday, will be launched later this month in more than 100 countries. It comes at a time when iTunes songs and album sales are falling, while streaming music leaders like Spotify and Deezer are gaining subscribers and revenue.The music service was the biggest news of the company's five-day conference, but Apple also announced a host of new upgrades and services coming later this year to the operating software for its popular iPhones, iPads and Mac computers.The new features including enhancements to Siri, the company's voice-activated digital assistant, as well as Apple Pay, Apple Maps and the Apple Watch. Executives also mentioned a new streaming TV service that Apple is reportedly hoping to announce later this year.Analysts say the new services and upgrades, which will be available when Apple releases free updates to its iOS and Mac OS software this fall, are part of a broader strategy to make Apple's devices indispensable.While many companies make smartphones and computers, "Apple's crown jewels are its software and online services," said analyst Daniel Ives, who follows tech companies for FBR Capital Markets.Some of the new features could provide new profits for the tech powerhouse. But perhaps more importantly, they may help keep customers from defecting to rivals like Google, which showed off new features for its competing Android mobile software at its event last month. Apple's voice-activated digital assistant will be integrated into the new music service, so subscribers can ask it to play songs from movie soundtracks, find hit songs from a certain year, or create playlists from top songs in different genres.Siri is also gaining more intelligence, according to Apple executives, who demonstrated by having Siri do things like search an iPhone-users' photos with a voice command, such as "Show me pictures from San Francisco last July."With the coming software update, Siri also will be able to anticipate certain requests and remember websites, said Apple senior vice president Craig Federighi. So, a user can tell Siri to "remember this" and it will later show a link to a website viewed earlier.Siri will also gain the ability to search within apps loaded on the iPhone, to provide links to information from a restaurant or food app, for example.Along with making payments tied to a credit or debit card, Apple Pay will soon incorporate store-issued payment cards and rewards from loyalty programs offered by merchants like Walgreens and Dunkin Donuts. That could be a key to making the service more useful for shoppers, according to analysts at Forrester Research. Apple announced an update to the watch operating system and said it will release the programming tools that independent developers need to build apps that can interact directly with the watch's hardware and sensors.