Condensed matter physics (CMP) is the field of physics that deals with the properties of large numbers of atoms that are interacting fairly strongly with each other. This includes solid and liquid materials. These materials exhibit emergent properties that cannot be predicted from an elementary description of atomic properties, and include exotic effects such as superfluidity and superconductivity. CMP is by far the largest subfield in physics. It involves many different types of research on thousands of different materials, in both pure and applied areas.