Quipu
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Broader term:Used for:- Khipu
- Kipu
![[Info]](https://onlinebooks.library.upenn.edu/info.gif)
Quipus and Witches' Knots: The Role of the Knot in Primitive and Ancient Cultures; With a Translation and Analysis of "Oribasis De Laqueis" (Lawrence, KS: University of Kansas Press, 1967), by Cyrus Lawrence Day, contrib. by Oribasius
Items below (if any) are from related and broader terms.
Filed under: Mathematical instruments- Modern Instruments and Methods of Calculation, ed. by E. M. Horsburgh (page images at Cornell)
- The Theory of Digital Handling of Non-Numerical Information and its Implications to Machine Economics (Zator Technical Bulletin #48; Boston: Zator Co., c1950), by Calvin N. Mooers (page images at HathiTrust)
- A Letter to Sir Humphry Davy, Bart., President of the Royal Society, etc., etc., on the Application of Machinery to the Purpose of Calculating and Printing Mathematical Tables (London: J. Booth; and Baldwin, Cradock and Joy, 1822), by Charles Babbage
- Linear Computations (New York: J. Wiley and Sons; London: Chapman and Hall, c1951), by Paul S. Dwyer (page images at HathiTrust)
- Modern Instruments and Methods of Calculation, ed. by E. M. Horsburgh (page images at Cornell)
- Computing Before Computers, ed. by William Aspray (PDF files at ed-thelen.org)
- A Practical Treatise on the Steel Square and its Application to Everyday Use (revised edition, 2 volumes; Chicago: F. J. Drake and Co., 1909), by Fred T. Hodgson
- Stair-Building and the Steel Square: A Manual of Practical Instruction in the Art of Stair-Building and Hand-Railing, and the Manifold Uses of the Steel Square (Chicago: American Technical Society, 1917), by Fred T. Hodgson and Morris Williams (multiple formats at archive.org)