Overhead document scanners are specialized devices that allow users to scan documents, images, and objects quickly and easily. These scanners have a camera mounted on an arm that can be positioned above the document or object, providing a clear view for scanning. Overhead document scanners can scan a wide range of sizes and types of documents, from small receipts to large posters. They are commonly used in libraries, archives, and offices, and can help to increase productivity and reduce clutter by digitizing paper documents.