Businesses associated with coin-operated photographic machines install, operate, hire or maintain self-service photo booths and similar equipment. These machines allow customers to take photographs by inserting coins or using another payment method, then receive printed strips or individual photos. Some newer machines can also provide digital copies, apply simple effects or let users choose layouts and backgrounds. Machines are commonly found in shopping centres, entertainment venues, arcades and other public spaces, and may be used for casual portraits, group pictures or novelty keepsakes. Some are designed to produce photographs for passports or other identity documents, but customers should check that the image meets the relevant requirements; a standard booth print may not be suitable. Services in this category can include installing and relocating machines, replenishing paper and other consumables, repairing cameras and printers, and maintaining payment systems.