Are the AND-OR and OR-AND forms of combinations exactly sum-of-products and product-of-sums?
Sum of products and product of sums are two ways to write the expression for a combinatorial logic function using symbols, as in the example, &quot;\$F_1 = y' + xy + x'yz'\$&quot;.
AND-OR and OR-AND are two ways to connect physical gates to implement a logical function.
There is a close relationship between them, but one is about expressing logic with symbols and the other is about building actual circuits to implement the logic.