Large bands also require many support staff who can move equipment, repair instruments, and uniforms, create and manipulate props used in performances, and provide food, water, and medical assistance. Additional staff may be utilized when the band hosts functions such as competitions and reviews. In high school bands, these activities are usually performed by volunteers, typically parents of band members or the band members of the lower grades. These people are often referred to as "runners" or "boosters". Significant support staff for college bands and independent corps are typically paid by the university or the corps organization, respectively.