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- Adding_machine abstract "See adding machine (disambiguation) for other uses of this term.An adding machine was 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, whilst 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 string 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 bring his machine, patented in 1820, into a simpler and more reliable one). However, they didn't gain widespread use until Dorr E. Felt started manufacturing his comptometer (1887) and Burroughs started the commercialization of differently conceived adding machines (1892).".
- Adding_machine thumbnail Mechanical_calculating_machine.jpg?width=300.
- Adding_machine wikiPageID "74133".
- Adding_machine wikiPageRevisionID "604448030".
- Adding_machine hasPhotoCollection Adding_machine.
- Adding_machine subject Category:1642_introductions.
- Adding_machine subject Category:Calculators.
- Adding_machine subject Category:Mechanical_calculators.
- Adding_machine subject Category:Office_equipment.
- Adding_machine comment "See adding machine (disambiguation) for other uses of this term.An adding machine was 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.".
- Adding_machine label "Adding machine".
- Adding_machine label "Máquina de somar".
- Adding_machine label "Máquina de sumar".
- Adding_machine label "Sumator (maszyna biurowa)".
- Adding_machine label "Суммирующая машина".
- Adding_machine sameAs Máquina_de_sumar.
- Adding_machine sameAs Sumator_(maszyna_biurowa).
- Adding_machine sameAs Máquina_de_somar.
- Adding_machine sameAs m.0jt4j.
- Adding_machine sameAs Q3547325.
- Adding_machine sameAs Q3547325.
- Adding_machine wasDerivedFrom Adding_machine?oldid=604448030.
- Adding_machine depiction Mechanical_calculating_machine.jpg.
- Adding_machine isPrimaryTopicOf Adding_machine.