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abacist.biz
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Domain name - abacist.biz
Site title - abacist bookkeeping
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services - 8
abacist - 5
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for - 4
small - 4
clients - 4
meet - 4
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Location Country - United States
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198.49.23.144 198.185.159.145 198.49.23.145 198.185.159.144
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☆ abacist.biz. 3600 IN HINFO "RFC8482" ""
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Brief facts about abacist:
An abacus, also called a counting frame, is a hand-operated calculating tool which was used from ancient times in the ancient Near East, Europe, China, and Russia, until the adoption of the Arabic numeral system. An abacus consists of a two-dimensional array of slidable beads. In their earliest designs, the beads could be loose on a flat surface or sliding in grooves. Later the beads were made to slide on rods and built into a frame, allowing faster manipulation. Each rod typically represents one digit of a multi-digit number laid out using a positional numeral system such as base ten. Roman and East Asian abacuses use a system resembling bi-quinary coded decimal, with a top deck representing fives and a bottom deck representing ones. Natural numbers are normally used, but some allow simple fractional components, and a decimal point can be imagined for fixed-point arithmetic.
Chinese Zhusuan - Zhusuan is the knowledge and practices of arithmetic calculation through the suanpan or Chinese abacus. In the year 2013, it has been inscribed on the UNESCO Representative List of the Intangible Cultural Heritage of Humanity.
Chisanbop - Chisanbop or chisenbop, sometimes called Fingermath, is a finger counting method used to perform basic mathematical operations.
Logical abacus - A logical machine or logical abacus is a tool containing a set of parts that uses energy to perform formal logic operations through the use of truth tables. Early logical machines were mechanical devices that performed basic operations in Boolean logic.
Mental abacus - The abacus system of mental calculation is a system where users mentally visualize an abacus to carry out arithmetical calculations. No physical abacus is used; only the answers are written down. Calculations can be made at great speed in this way.
Napier's bones - Napier's bones is a manually-operated calculating device created by John Napier of Merchiston, Scotland for the calculation of products and quotients of numbers. The method was based on lattice multiplication, and also called rabdology, a word invented by Napier.
Sand table - A sand table uses constrained sand for modelling or educational purposes. The original version of a sand table may be the abax used by early Greek students. In the modern era, one common use for a sand table is to make terrain models for military planning and wargaming.
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