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2. Hole punch - Wikipedia

   en.wikipedia.org/wiki/Hole_punch

   Three different international-standard two-hole punches. 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).

3. Punching - Wikipedia

   en.wikipedia.org/wiki/Punching

   Die and punch shapes affect the force during the punching process. The punch force increases during the process as the entire thickness of the material is sheared at once. A beveled punch helps in the shearing of thicker materials by reducing the force at the beginning of the stroke. However, beveling a punch will distort the shape because of ...

4. Teletype Model 33 - Wikipedia

   en.wikipedia.org/wiki/Teletype_Model_33

   The Model 32, used for Telex service, had a three-row keyboard and narrower, five-hole paper tape. A Model 35 ASR, at the Living Computer Museum in Seattle The Model 32 line used the same mechanism and looked identical, except for having a three-row keyboard and, on the ASR version, a five-hole paper tape reader and punch, both appropriate for ...

5. Ring binder - Wikipedia

   en.wikipedia.org/wiki/Ring_binder

   A standard 8 + 1 ⁄ 2 by 11 inches (220 mm × 280 mm) sheet of paper has three holes with spacing of 4 + 1 ⁄ 4 inches (110 mm). There is a variant for half-letter size pages (8 + 1 ⁄ 2 by 5 + 1 ⁄ 2 inches or 220 mm × 140 mm), whose three rings are 2 + 3 ⁄ 4 inches (70 mm) apart. "Ledger" size binders hold 11-by-17-inch (28 by 43 cm ...

6. Comb binding - Wikipedia

   en.wikipedia.org/wiki/Comb_binding

   To bind a document, the user first punches holes in the paper with a specialized hole punch. Pages must be punched a few at a time with most of these machines. If hard covers are desired, they must be punched as well. In bulk applications, a paper drilling machine may be used. Then the user chooses a spine size that will match the document.

7. Chad (paper) - Wikipedia

   en.wikipedia.org/wiki/Chad_(paper)

   Chads from punched cards.Each chad is about 3 mm (1 ⁄ 8 in) long. Votomatic [1] voting machines of the type used in the 2000 election in Florida The chip (chad) receiver from a UNIVAC key punch Pouring chads from a jar at the Computer History Museum Asymmetrical chad produced by a railroad ticket punch