This picture is pretty cool. It shows how the system has developed over the years. I had no idea a few of these were even a thing! I do remember a few of the older versions. Funny how they named them after treats. Which name do you like the best and which do you think had the most advancement?
Best name and biggest advancement I would say goes to Jelly Bean. It is a fun name, a good candy, and that is essentially the point when Android became the best OS on the market.
I agree with princezelda. It seems like they really changed the game and I feel they took the lead in terms of the Apple vs Android fight.