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Abacus
The need for help in counting large numbers, resulted in the invention of many devices; one of which was the Abacus. History shows its use in many lands, not solely in the Orient as many thought.Early versions used in Greece and Rome were actually "Counting boards".These were pieces of wood, stone or metal that had carved grooves or painted lines. Beads, pebbles or metal discs were moved between the grooves or lines by the person doing the counting.The Abacus, however, is made usually of wood or plastic(modern times) consisting of a frame with rods on which beads slide freely. 

The Abacus was known by diferent names in many countries:  The Turks called the (more...)

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View1930Abacus Sanko Soroban Wooden Serial Number: Picture
View Abacus Serial Number: Picture Location: Inventor:
View Abacus with ten rows of colored beads and slate bo
View1200Abacus--Chinese Swan pan (or Souanpan) -- First ap
View1958Abacus--Chinese--Lee Kai-Chen Serial Number: None
View Abacus--Italian Serial Number: None Picture Locati
View1500Abacus--Japanese Soroban Serial Number: None Pictu
View Abacus--Model Horsehow-Chinese Serial Number: None
View Abacus--Model Miniature--Japanese Serial Number: N
View Abacus--Model Ten Wire Serial Number: Picture Loca
View Abacus--Russian Stchoty Serial Number: None Pictur
View Book Ends.
View Chinese rare 15 columnation abacus with switch(mec
View Japanese counting board for children.
View Rectangular 2 wire counting device For educational use. 1st graders. Patent Number 1,028,227 June 4th, 1912
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    Abacus Sanko Soroban Wooden Serial Number: Picture
  • navigation
    Abacus Serial Number: Picture Location: Inventor:
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    Abacus with ten rows of colored beads and slate bo
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    Abacus--Chinese Swan pan (or Souanpan) -- First ap
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    Abacus--Chinese--Lee Kai-Chen Serial Number: None
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    Abacus--Italian Serial Number: None Picture Locati
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    Abacus--Japanese Soroban Serial Number: None Pictu
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    Abacus--Model Horsehow-Chinese Serial Number: None
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    Abacus--Model Miniature--Japanese Serial Number: N
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    Abacus--Model Ten Wire Serial Number: Picture Loca
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    Abacus--Russian Stchoty Serial Number: None Pictur
  • navigation
    Book Ends.
  • navigation
    Chinese rare 15 columnation abacus with switch(mec
  • navigation
    Japanese counting board for children.
  • navigation
    Rectangular 2 wire counting device For educational use. 1st graders. Patent Number 1,028,227 June 4th, 1912
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    Sharp Electronic Calculator combination with abacus. Elsimate EL 428 Patents: 3902169 & 3976994 Made in Korea
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    Sharp ELSI MATE EL-8048