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There is no vertical file at the county HQ labeled “Cheerios Park: Name.”

Visitors also encountered the latest and arguably most important organizational invention of the century, the vertical file, created by Melvil Dewey, inventor of the Dewey Decimal System.

This happens so often that she has prepared a document that sits in the vertical file that explains how little we are sure of.

In “Cubed” he walks us through the invention of a few of our favorite things: the vertical file cabinet, the suspended ceiling, the fluorescent light bulb, the elevator, the Dictaphone, the human-resources department.

Probably the best arrangement for a large part of this material is to assign a subject heading or a class number and keep in a vertical file alphabetically or by class number.