Abstract: A ring binder for a filing system with a plurality of cover panels of a cover that are pivotally connected together for pivoting between open and closed cover positions. The cover defines an interior binder space between the cover panels in the closed cover position. A ring binding member is attached with the cover and includes rings that are openable and closeable for receiving and releasing pages and for binding and holding the pages inside the binder in the closed cover position. The binding member is preferably accessible in the open cover position. At least one of the cover panels comprises an indexing extension that extends beyond the cover panels that are disposed opposite thereto in the closed cover position by a distance sufficient for receiving and displaying indexing indicia visible from opposite sides of the first cover panel in the closed cover position and for viewing the indicia when the binder is disposed on a shelf substantially aligned with a plurality of other binders.