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A Rolodex file used in the 1970s. A Rolodex is a rotating card file device used to store a contact list.Its name, a portmanteau of the words "rolling" and "index", has become somewhat genericized for any personal organizer performing this function, or as a metonym for a total accumulation of business contacts.
Arnold Neustadter (25 August 1910 – 17 April 1996) [1] was an American inventor and businessman. He invented the Rolodex desktop rotating card file and other office equipment with Danish engineer Hildaur Neilson, [2] which has been called "a triumph of low technology" [3] and "a lasting symbol of the art of networking".
A hole punch, also known as hole puncher, or paper puncher, is an office tool that is used to create holes in sheets of paper, often for the purpose of collecting the sheets in a binder or folder (such collected sheets are called loose leaves). A hole punch can also refer to similar tools for other materials, such as leather, cloth, or sheets ...
A stopped hole drilled in the front center portion of the hammer mass facing the tumbler acts as a receiver for the rod, and as an anvil for the punch action. The tumbler provides the automation. When reset, a provision is made such that the tumbler rod is cocked slightly, so that its resting position is skewed and the tip contacts the hammer ...
A punch is a tool used to indent or create a hole through a hard surface. They usually consist of a hard metal rod with a narrow tip at one end and a broad flat "butt" at the other. When used, the narrower end is pointed against a target surface and the broad end is struck with a hammer or mallet , causing the blunt force of the blow to be ...
The four-hole version has no ISO standard [citation needed]. The distances between holes are 80 millimetres (3.1 in) (3 × 8). The most common type in Canada and the United States is a three-ring system for letter size pages ( 8 + 1 ⁄ 2 by 11 inches or 220 mm × 280 mm), whose size is similar to ISO 216-based A4 size.