An adding machine is a class of mechanical calculator, usually specialized for bookkeeping calculations.In the United States, the earliest adding machines were usually built to read in dollars and cents. Adding machines were ubiquitous office equipment until they were phased out in favor of calculators in the 1970s and by personal computers beginning in about 1985. The older adding machines were rarely seen in American office settings by the year 2000.
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| - Màquina de sumar (ca)
- Adding machine (en)
- Máquina de sumar (es)
- Sumator (maszyna biurowa) (pl)
- Máquina de somar (pt)
- Суммирующая машина (ru)
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| - Una màquina de sumar és un tipus de calculadora, generalment especialitzada per als càlculs de comptabilitat. En els Estats Units, les màquines sumadores molt velles generalment van ser construïdes per llegir en dòlars i cèntims. (ca)
- Una máquina de sumar es un tipo de calculadora, generalmente especializada para los cálculos de contabilidad. En la mayoría de países del mundo, las máquinas sumadoras solían ser muy viejas generalmente fueron construidas para leer en dólares y céntimos. (es)
- Sumator – albo jej część wykonująca dwa lub trzy podstawowe działania arytmetyczne: dodawanie, odejmowanie i mnożenie. Często utożsamiany z prostym urządzeniem liczącym zbudowanym z przesuwnych listewek. Jej rozszerzeniem jest arytmometr, mogący dodatkowo dzielić. (pl)
- Суммирующая машина — механическая машина, автоматически суммирующая числа, вводимые в неё оператором. (ru)
- Uma máquina de somar é um tipo de máquina calculadora especializada, utilizada outrora para cálculos em contabilidade. Estas velhas máquinas podiam ser de manutenção difícil; e davam respostas erradas caso o mecanismo falhasse. Provavelmente, era melhor aprender a usar um ábaco. (pt)
- An adding machine is a class of mechanical calculator, usually specialized for bookkeeping calculations.In the United States, the earliest adding machines were usually built to read in dollars and cents. Adding machines were ubiquitous office equipment until they were phased out in favor of calculators in the 1970s and by personal computers beginning in about 1985. The older adding machines were rarely seen in American office settings by the year 2000. (en)
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| - Una màquina de sumar és un tipus de calculadora, generalment especialitzada per als càlculs de comptabilitat. En els Estats Units, les màquines sumadores molt velles generalment van ser construïdes per llegir en dòlars i cèntims. (ca)
- An adding machine is a class of mechanical calculator, usually specialized for bookkeeping calculations.In the United States, the earliest adding machines were usually built to read in dollars and cents. Adding machines were ubiquitous office equipment until they were phased out in favor of calculators in the 1970s and by personal computers beginning in about 1985. The older adding machines were rarely seen in American office settings by the year 2000. Blaise Pascal and Wilhelm Schickard were the two original inventors of the mechanical calculator in 1642. For Pascal, this was an adding machine that could perform additions and subtractions directly and multiplication and divisions by repetitions, while Schickard's machine, invented several decades earlier, was less functionally efficient but was supported by a mechanised form of multiplication tables. These two were followed by a series of inventors and inventions leading to those of Thomas de Colmar, who launched the mechanical calculator industry in 1851 when he released his simplified arithmometer (it took him thirty years to refine his machine, patented in 1820, into a simpler and more reliable form). However, they did not gain widespread use until Dorr E. Felt started manufacturing his comptometer (1887) and Burroughs started the commercialization of differently conceived adding machines (1892). (en)
- Una máquina de sumar es un tipo de calculadora, generalmente especializada para los cálculos de contabilidad. En la mayoría de países del mundo, las máquinas sumadoras solían ser muy viejas generalmente fueron construidas para leer en dólares y céntimos. (es)
- Sumator – albo jej część wykonująca dwa lub trzy podstawowe działania arytmetyczne: dodawanie, odejmowanie i mnożenie. Często utożsamiany z prostym urządzeniem liczącym zbudowanym z przesuwnych listewek. Jej rozszerzeniem jest arytmometr, mogący dodatkowo dzielić. (pl)
- Суммирующая машина — механическая машина, автоматически суммирующая числа, вводимые в неё оператором. (ru)
- Uma máquina de somar é um tipo de máquina calculadora especializada, utilizada outrora para cálculos em contabilidade. Estas velhas máquinas podiam ser de manutenção difícil; e davam respostas erradas caso o mecanismo falhasse. Provavelmente, era melhor aprender a usar um ábaco. (pt)
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