"abstraction" - key terms from Wikipedia

abstraction
abstraction	by layering
abstraction	from the human form
abstraction	layer
abstraction	layers
century abstraction
control abstraction
data abstraction
geometric abstraction
hardware abstraction	layer
level of abstraction
level of abstraction	describes
levels of abstraction
lyrical abstraction
physics abstraction	layer
post painterly abstraction
recursive abstraction
refined abstraction
total abstraction