Twitter, poised to make its splashy entrance on Wall Street, has helped define modern social networking. But while seeking to establish itself as an Internet powerhouse, it must also prove it can fend off a rising threat from a younger generation of nimble social outlets that offer clever new ways for people to connect and share content.
Among these up-and-comers are Snapchat, WhatsApp, Line, Tumblr, Instagram, Pinterest, Kakao, and Reddit. Each has a different take on what social networking should look like — inventive ways of private messaging and creating content with a rich infusion of images and videos. Full story for BostonGlobe.com subscribers.