a sheet of heavy paper stock or cardboard, scored near the middle, its halves bent so they rest side by side, and used as a loose cover to keep documents and other flat materials together, especially for purposes of filing
Computinga directory structure that maintains files into groups
a printed leaflet designed to be folded so that a person can carry it easily within a hand and fit it into a pocket or purse
to place papers documents or other flat materials within a file folder
Folders1 usually have tabs where a title can be written. Tabs commonly run a fifth, a third, a half, or the full length of the folder.
Five Xerox employees, working on an early graphical user interface (for the Star Information System) intentionally chose to employ folder2 in a computing sense to help users better understand how to navigate within the system. They explained this in the article “Designing the Star User Interface” from the April 1982 issue of Byte: “We decided to create electronic counterparts to the physical objects in an office: paper, folders, file cabinets, mail boxes, and so on—an electronic metaphor for the office.”
Timetables and brochures are common examples of folders3 in the third sense.