Abstract: The problem of storing microfiche transparencies, cards, documents, photographs or any other sheets of material in the vertical or inclined position, is solved by a simple rectangular tray with inclined ends and side walls, the inner top portions of which contain vertically extending grooves for receiving a pair of lugs on each side of planar rectangular partitions. The spacing between the lugs is such that the partition is inclined by no more than 30.degree. from the vertical when the lugs on one side of the partition are inserted into adjacent grooves. In the vertical position the lugs are vertically aligned in the same plane as the body of the partition.