Texas Instruments TI-85 data
File type: Various data file
An 85b file is a backup file created for the Texas Instruments TI-85 graphing calculator.
It stores a copy of the calculator's memory and is used with TI Connect to transfer or restore data.
File type category:
Various data file
Date updated: October 9, 2026
The 85b file extension identifies a Texas Instruments TI-85 backup file. The TI-85 is a programmable graphing calculator developed by Texas Instruments.
An 85b file contains a backup of TI-85 calculator data and programs. It is intended for restoring that information to a TI-85 rather than for viewing as a document on a computer.
TI Connect for Microsoft Windows can transfer the backup between a computer and a compatible calculator. The format is associated with the TI-85.
Open or transfer an 85b file with TI Connect on Microsoft Windows. Connect the compatible TI-85 calculator to the computer, then use TI Connect to send the backup to the calculator or restore it when supported.
Because the file is a calculator backup, it is not intended to be read as text or opened in a general-purpose document application.
An 85b file is a calculator backup, so it normally has no useful conversion to a standard computer file format.
Use TI Connect to restore the backup to a TI-85. If individual programs or data are needed in another format, transfer them from the calculator with software that supports the target calculator format rather than converting the backup directly.
Software applications that handle other tasks involving 85b files:
Microsoft Windows
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