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Elektronika B3-34 (Cyrillic: Электроника Б3-34) was a Soviet programmable calculator. It was released in 1980 and was sold for 85 rubles . B3-34 used reverse Polish notation and had 98 bytes of instruction memory, four stack user registers and 14 addressable registers.
The calculator was superseded, in 1982, by the HP-15C.. Although it is argued the HP-41C (introduced late 1979 and only a matter of months after the HP-34C) was a replacement for the HP-34C, they were in fact differentiated as much by price (the HP-34C being 50% that of the HP-41C) as by functionality and performance (the HP-41C being the first HP LCD-based and module-expandable calculator ...
The Curta was conceived by Curt Herzstark in the 1930s in Vienna, Austria.By 1938, he had filed a key patent, covering his complemented stepped drum. [3] [4] This single drum replaced the multiple drums, typically around 10 or so, of contemporary calculators, and it enabled not only addition, but subtraction through nines complement math, essentially subtracting by adding.
The simplest example given by Thimbleby of a possible problem when using an immediate-execution calculator is 4 × (−5). As a written formula the value of this is −20 because the minus sign is intended to indicate a negative number, rather than a subtraction, and this is the way that it would be interpreted by a formula calculator.
The ensemble comprises three sculptures: The Table of Silence (Masa tăcerii), The Gate of the Kiss (Poarta sărutului), and the Infinity Column (Coloana Infinitului) on an axis 1.3 km (3 ⁄ 4 mile) long, oriented west to east. The ensemble is considered to be one of the great works of 20th-century outdoor sculpture.
The pascaline (also known as the arithmetic machine or Pascal's calculator) is a mechanical calculator invented by Blaise Pascal in 1642. Pascal was led to develop a calculator by the laborious arithmetical calculations required by his father's work as the supervisor of taxes in Rouen , France. [ 2 ]
Their total size is about 140 TB. [3] They were attacked by a ransomware in 2021, and have been offline since then. [27] Ronald de Man and Bojun Guo, who generated the seven man DTZ tablebase called the Syzygy tablebase in 2018. They were able to reduce the size of seven-man tablebases from 140 TB to 18.4 TB. [4]
As in Sudoku, the goal of each puzzle is to fill a grid with digits –– 1 through 4 for a 4×4 grid, 1 through 5 for a 5×5, 1 through 6 for a 6×6, etc. –– so that no digit appears more than once in any row or any column (a Latin square). Grids range in size from 3×3 to 9×9.