NCAA Division I independent schools are four-year institutions that compete in college athletics at the NCAA Division I level, but do not belong to an established athletic conference for a particular sport. These schools may however still compete as members of an athletic conference in other sports. A school may also be fully independent, and not belong to any athletic conference for any sport at all. The reason for independent status varies among institutions, but it is frequently because the school's primary athletic conference does not sponsor a particular sport.