AB (however, to to be even more specific, can be called AABB [since each section is repeated])
Rounded Binary
A:||:BA:|| = Each section is often repeated (AA-[BA][BA])= The B section will end with a "return" of the opening material from the A section= Can also be written as ABA' (is different from Ternary form in that the B section [in Ternary Form] contrasts completely with the A material)
