The Ottoman Empire was not an African society. It was centered in Turkey in western Asia and ecompassed parts of Asia and Europe.
Process of elimination:
~~Ancient kingdoms - possibly - depending on which one(s) you're referring to - http://en.wikipedia.org/wiki/Ancient_India (not in Africa); http://en.wikipedia.org/wiki/Ancient_egypt (?); http://en.wikipedia.org/wiki/Ancient_greece (not in Africa)
~~Ottoman Empire - no - not in Africa
~~Nomadic cultures - possibly - http://en.wikipedia.org/wiki/Nomadic
~~Sedentary Farmers - no - this term is oxymoronic! Farmers don't sit around to do their jobs; they are very active people
What do you think?