TI-85 data
File type: Various data file
A .85k file is a data file used with the TI-85 graphing calculator.
File type category:
Various data file
Date updated: October 9, 2026
The .85k file extension is associated with the TI-85, a programmable graphing calculator developed by Texas Instruments. The calculator uses a Zilog Z80 processor.
An .85k file contains data used by the TI-85 and is handled by software that transfers or manages data for the device.
The format is a legacy calculator format. TI Connect provides support on Microsoft Windows, while TiLP provides support on multiple platforms.
On Microsoft Windows, use TI Connect to transfer or manage the file with a TI-85 calculator. On other supported platforms, use TiLP.
These programs may transfer the file to a connected calculator rather than display it as readable text on the computer.
There is no general-purpose conversion needed for this calculator data format. Use TI Connect or TiLP to transfer the file to a TI-85 or to manage it in the context of that calculator.
Software applications that handle other tasks involving 85k files:
Microsoft Windows
Multiplatform
Language