Abstract: A tickler file containing index cards arranged by date and containing data slips filed under the index cards in accordance with the date on the index cards. In order to permit ready access to the data slips in the tickler file by subject matter, rather than by date, the data slips are wider than the index cards and data slips and index cards are stored in a wide sidewise slanted file tray, so that all rest on the bottom and settle against the lower side wall of the file tray. Indicia relating to subject matter is applied to the edge of the data slips which project beyond the index cards. Said indicia can readily be scanned for particular subject matter by riffling the projecting side edges of the data slips.