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An abacus (pl.: abaci or abacuses), 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 Hindu–Arabic numeral system. [1] An abacus consists of a two-dimensional array of slidable beads (or similar objects). In their ...
The Late Roman hand abacus shown here as a reconstruction contains seven longer and seven shorter grooves used for whole number counting, the former having up to four beads in each, and the latter having just one. The rightmost two grooves were for fractional counting. The abacus was made of a metal plate where the beads ran in slots.
In architecture, an abacus (from the Ancient Greek ἄβαξ (ábax), ' slab '; or French abaque, tailloir; pl.: abacuses or abaci) [1] is a flat slab forming the uppermost member or division of the capital of a column, above the bell.
Uruk period: globular envelope with a cluster of accountancy tokens, from Susa. Louvre Museum. The earliest known writing for record keeping emerged from a system of accounting that used small clay tokens.
The history of computer science began long before the modern discipline of computer science, ... The earliest known tool for use in computation was the abacus, ...
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 idea is simple. Once a game, a manager gets to put his best batter at the plate regardless of where the batting order stands. So imagine, as a pitcher facing the Dodgers, you get Shohei Ohtani ...
In the Ionic capitals of the archaic Temple of Artemis at Ephesus (560 BC) the width of the abacus is twice that of its depth, consequently the earliest Ionic capital known was virtually a bracket capital. A century later, in the temple on the Ilissus, the abacus has become square (See the more complete discussion at Ionic order).