List of android FIRMWARE / OS

What are the android OS you know?

below are the list of firmware / OS version

* Cup cake version 1.5 

* Donut version 1.6

* Eclair 2.0 

* Froyo 2.2

* Gingerbread 2.3

* Honeycomb 3.0

* Ice cream Sandwich 4.0

* Jelly Bean

* Kitkat 4.1 

* Lollipop 5.0 

* Marsmallow 6.0 

* Nougat 

* Oreo 

* Pie