What design pattern is used in a ORM?

Well, I've a question. Is it a ORM an Design Pattern or it uses Design Patterns?If it uses, which? I just found on WikiPedia one DP (DAO).

I'm a bit confused cause some articles say that ORM is a DP and others that it's not - and no one say witch DP it uses.

ORM Offensive Anti Pattern

ORM - Wikipedia