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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.
Abacus – The Aztec and Maya of Mesoamerica performed arithmetic operations using an abacus. It served as a more accurate and faster alternative to a written solution or relying on memory. Archaeologists have recorded the Mesoamerican abacus, or Nepohualtzintzin, as being present in Mesoamerica from at least between 900 and 1000 CE. [1]
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 Manhai pillar capital is the portion of an ancient capital found in the city of Manhai (also spelled Mainhai), one and half miles to the east of the eastern gateway of Kausambi, Uttar Pradesh in India, and published in 1980 in "Reh Inscription of Menander And The Indo-greek Invasion Of The Ganga Valley" by G. R. Sharma.
Sumer (/ ˈ s uː m ər /) is the earliest known civilization, located in the historical region of southern Mesopotamia (now south-central Iraq), emerging during the Chalcolithic and early Bronze Ages between the sixth and fifth millennium BC.
The archaeological site of Abu Salabikh (Tell Abū Ṣalābīkh), around 20 km (12 mi) northwest of the site of ancient Nippur and about 150 kilometers southeast of the modern city of Baghdad in Al-Qādisiyyah Governorate, Iraq marks the site of a small Sumerian city that existed from the Neolithic through the late 3rd millennium, with cultural connections to the cities of Kish, Mari and Ebla.
The Bajo de la Campana, located approximately 2.5 km (1.6 mi) offshore from La Manga del Mar Menor and is located around 20 miles Northeast of Cartagena, Spain. [3] Bajo de la Campana consists of three geological formations: Isla Grosa, El Farallón rock, and La Laja reef.
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.