self-checkout

thumb|NCR Corporation model of self-service checkouts and fast-lane at a [[Sainsbury's store]] thumb|NCR Corporation model of self-service checkout at an IKEA store

Self-checkouts (SCOs), also known as assisted checkouts (ACOs) or self-service checkouts, are machines that allow customers to complete their own transaction with a retailer without using a staffed checkout. When using SCOs, customers scan item barcodes before paying for their purchases without needing one-to-one staff assistance. Self-checkouts are used mainly in supermarkets, although they are sometimes also found in department or convenience stores. Most self-checkout areas are supervised by at least one staff member, often assisting customers to process transactions, correcting prices, or otherwise providing service.