A filing cabinet is a container made of wood or steel. There are a number of drawers in the cabinet where the folders are kept. The size of the drawers depends on the volume of papers to be preserved. Each drawer in the cabinet is fitted with a slider, which pushes it backward and pulls it forward. Sometimes guide cards are inserted into the drawers to divide the cabinet into different sections. The filing cabinet should be fireproof. Filing cabinets are used in vertical filing system.