The creative arts are often divided into more specific categories, such as decorative arts, plastic arts, performing arts, or literature. So for example painting is a form of visual art, and poetry is a form of literature. An art form is a specific form for artistic expression to take; it is a more specific term than art, but less specific than genre. An artistic medium is the substance the artistic work is made out of. So for example, stone and bronze are both mediums that sculpture uses sometimes. Multiple forms can share a medium (poetry and music, both use sound), or one form can use multiple media.