The term PIE PRODUCER can refer to two different types of businesses: a pizzeria and a BAKERY. A pizzeria is an establishment that specializes in the production of pizza, which is a type of Italian flatbread typically topped with tomato sauce, cheese, and other ingredients. A BAKERY is a business that produces baked goods such as cakes, pies, cookies, and breads. Both a pizzeria and a BAKERY can be considered pie producers, as they both produce pies as part of their product offerings.