That's not true. They do use AADSAS. I applied to them using this service. It's just that you can apply directly to them without using AADSAS if you want to. And they also require that you fill out one of their on-line forms. However, they don't mention that. You have to go to their website to learn that. To be honest with you, applying to OU has been a pain in the ass. And the admissions secretary Susan is a total....well you get the idea. She is of no help. If you are not an Oklahoma resident, I wouldn't encourage applying to this school just because of the bureacratic process they make you undergo. Their admissions process is highly disorganized.