A shelf like projection is a type of structure that protrudes from a wall or other surface. It is commonly referred to as a LEDGE and is typically used to provide support for items such as books, pictures, or other objects. The term 'LEDGE' is derived from the Old English word 'leccan, ' which means 'to lean.' LEDGE structures are often found in homes, offices, and other buildings, and can be made from a variety of materials including wood, metal, and stone.