What does HRWW stand for?

Hard Red Winter Wheat

The class of wheat used mostly for bread and all-purpose flour; seeded in the fall; ranges from medium to high in protein; may have either a hard or soft endosperm; accounts for more than 40% of the US wheat crop and more than half of US wheat exports; produced in the Great Plains. Wide range of protein, good milling and baking characteristics. Used to produce bread, rolls, and, to a lesser extent, sweet goods and all-purpose flour.