There is only 1 droid OS, but there are different versions of this OS, 2.3.1, 2.3.2, 2.3.3 etc when they update it's a newer version with new goodies.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.