You will be given a definition of a task first, then some input of the task.
Generate a correct and concise answer for the question based on the words in the context.

Context : CyanogenMod (pronounced /sa.n.o.dn.md/ or sigh-ah-no-gen-mod), usually abbreviated to CM, is an open-source operating system for smartphones and tablet computers, based on the Android mobile platform.
Question : The CyanogenMod is based upon what?
Output:
Android