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Many such analog devices were used for performing different calculation tasks like the ones shown below:       
 
Many such analog devices were used for performing different calculation tasks like the ones shown below:       
 
<gallery>
 
<gallery>
File:South-pointing_chariot_(Science_Museum_model).jpg|Model for pointing out direction, China
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File:South-pointing_chariot_(Science_Museum_model).jpg|Model for pointing out direction, China, 200-265
File:Torquetum.jpg| Torquetum for astronomical instruments,
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File:Torquetum.jpg| Torquetum for astronomical instruments,, 1100-1200
 
File:Sliderule_2005.png|Slideruler for calculations, 1630
 
File:Sliderule_2005.png|Slideruler for calculations, 1630
 
File:Napier's_calculating_tables.JPG|John Napier's calculating tables, 1642
 
File:Napier's_calculating_tables.JPG|John Napier's calculating tables, 1642
 
File:Pascaline_calculator.jpg|Pascal Calculator, 1680
 
File:Pascaline_calculator.jpg|Pascal Calculator, 1680
File:Early_SSA_accounting_operations.jpg|Punched cards for accounting calculations,  
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File:Early_SSA_accounting_operations.jpg|Punched cards for accounting calculations, 1920s
 
</gallery>     
 
</gallery>     
 
All of these are examples of analog devices that could perform calculations, in other words, analog computers.
 
All of these are examples of analog devices that could perform calculations, in other words, analog computers.

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