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The IKEA Lack table in white. The Lack (stylized as LACK) is a table manufactured by IKEA since 1981. [1] Modifications.
The counting board is the precursor of the abacus, [1] and the earliest known form of a counting device (excluding fingers and other very simple methods). Counting boards were made of stone or wood, and the counting was done on the board with beads, pebbles etc. [ 2 ] Not many boards survive because of the perishable materials used in their ...
The Greek abacus was a table of wood or marble, pre-set with small counters in wood or metal for mathematical calculations. [ citation needed ] This Greek abacus was used in Achaemenid Persia, the Etruscan civilization , Ancient Rome, and the Western Christian world until the French Revolution .
7% of the wood that becomes IKEA furniture comes from Belarus, where the state owns all of the country's forests. IKEA has been accused of financing President of Belarus Alexander Lukashenko 's repression against political opponents, with Anna Sundström, Secretary-General of the Olof Palme International Center , arguing that the money ...
A suanpan (top) and a soroban (bottom). The two abaci seen here are of standard size and have thirteen rods each. Another variant of soroban. The soroban is composed of an odd number of columns or rods, each having beads: one separate bead having a value of five, called go-dama (五玉, ごだま, "five-bead") and four beads each having a value of one, called ichi-dama (一玉, いちだま ...
The word "abacus" was first mentioned by Xu Yue (160–220) in his book suanshu jiyi (算数记遗), or Notes on Traditions of Arithmetic Methods, in the Han dynasty. As it described, the original abacus had five beads (suan zhu) bunched by a stick in each column, separated by a transverse rod, and arrayed in a wooden rectangle box. One in the ...
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