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ICT student textbook/Science Technology and Society (view source)
Revision as of 11:25, 8 December 2016
, 11:25, 8 December 2016→Analog and digital technologies
Such a device is called an [[wikipedia:Analog_computer|analog computer.]]
Such a device is called an [[wikipedia:Analog_computer|analog computer.]]
Can you guess what these two images are? The one on the left is called the Abacus which was used to perform calculations with numbers by moving the beads. The one on the right is called the Antikythera machine which was used in Greece to calculate the positions of astronomical objects. Over the years, computational technologies and devices continued to develop, some for general calculations like the slide rule or Napier's calculating tables and some for specific applications like predicting tiles.
Can you guess what these two images are? The one on the left is called the Abacus which was used to perform calculations with numbers by moving the beads. The one on the right is called the Antikythera machine which was used in Greece to calculate the positions of astronomical objects. Over the years, computational technologies and devices continued to develop, some for general calculations like the slide rule or Napier's calculating tables and some for specific applications like predicting tides.
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
File:Torquetum.jpg| Torquetum for astronomical instruments,
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,
File:Early_SSA_accounting_operations.jpg|Punched cards for accounting calculations,
</gallery>
</gallery>
All of these are examples of analog devices that could perform calculations, in other words, analog computers.
During the mechanical and electric analog phases of technology, information was created by a series of physical changes converted into electrical impulses for storing and machine, and each analog information storage required a specialized equipment to decode and read the information. A cassette player or a gramaphone disc is an example of such a device. Analog machines could be programmed for specific applications as well as for general computing. Since information was being represented physically, results were not always accurate as they could not be replicated exactly.
During the mechanical and electric analog phases of technology, information was created by a series of physical changes converted into electrical impulses for storing and machine, and each analog information storage required a specialized equipment to decode and read the information. A cassette player or a gramaphone disc is an example of such a device. Analog machines could be programmed for specific applications as well as for general computing. Since information was being represented physically, results were not always accurate as they could not be replicated exactly.
===== Development of a programmable computer =====
===== Development of a programmable computer =====
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