Name Google's service launched in 2009 from which support was withdrawn in 2010, which offered 'next-generation email', messaging and twitter-style micro-blogging?
Waving Speed of a wave Wave motion in liquids Wave (physics) Traveling wave Traveling Wave Billow Undulatory Theory Wave Motion Wave Wave motion Wave theory Travelling wave Traveling waves Waves Periodic wave Progressive wave Wave motion in fluids Wave (the earth sciences)