Files with 89k file extension can be found as part of the TI-89 graphics calculator device system files.

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89K file extension - TI-89 application

What is 89k file? How to open 89k files?

File type specification:

Various data file type icon Various data file type

The 89k file extension is mainly related to TI-89, programmable graphics calculator devices from Texas Instruments and used for one of its default file type.

These 89k files contain application data for the device. TI-89 was introduced in late 90s.

This 89k file type entry was marked as obsolete and no longer supported file format.

This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.

Updated: June 14, 2018

Help how to open:

Probably not meant to be accessed by the user.

How to convert:

Probably cannot be converted to anything else.

Related links:

TI-86 entry at Wikipedia

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