FACEBOOK’S 500 million-plus users will soon be able to track friends’ whereabouts, as the world’s largest Internet social network adds technology to increasingly tie its virtual world to everyday life.

Is music something you own or something you rent? How music fans answer that question in coming months will help determine the viability of a new slate of online music services that offer to fill portable music players with an unlimited number of songs for a monthly fee.

Microsoft does not have to include a rival’s software in its Windows operating system, a US appeals court ruled in overturning a judge’s order.