1. sticks used for calculations
2. divining rods
Wikipedia definition
3. Counting rodsCounting rods are small bars, typically 3–14 cm long, used by mathematicians for calculation in China, Japan, Korea, and Vietnam. They are placed either horizontally or vertically to represent any number and any fraction. The written forms based on them are called rod numerals. They are a true positional numeral system with digits for 1-9 and a blank for 0, since Warring states to 16th century.
Read “Counting rods” on English Wikipedia
Read “算木” on Japanese Wikipedia
Read “Counting rods” on DBpedia


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