“what is the most up-to-date software version available on TI-83 plus calculators?”
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The latest version of the TI-83 Plus operating system is version 1.19. To check what version of OS is on your calculator, with the calculator on, press [2nd] [+] then [1]. If you need assistance updating your operating system I would recommend contacting our support team at the below URL: http://education.ti.com/educationportal/sites/US/nonProductSingle/global_forms_customersvcform.html
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