Almost three years after the birth of the T-Mobile G1 , the world's first Android smartphone, we pause to take a look back at what the little green dude has given us. Sure, we've known that the OS has been very busy in the United States and around the world, but we really had no idea just how busy it was. And if we expanded the list beyond handsets not with U.S. carriers, it would be even longer.

Remember that it wasn't so long ago when Android was just a concept. And not long before that, the only android we knew was Data on "Star Trek." But now as its market share continues to grow and the OS has landed in the tablet space, Android has emerged as a powerhouse in the mobile space.

Editors' note: This list is current as of August 2, 2011. For brevity's sake, we've focused only on models previously or currently sold by U.S. carriers.