The 00_ file extension is associated with Winfunktion Mathematik v8.0. An old German math program released in 1998.
The 00_ files are used for julia set math fractals.
There are no information available if the 00_ files are still used in the newest versions for Julia set fractals.
How to open:
This file type is not meant to be opened directly, there is no software that could open and work with it directly, or there is no information available in public sources about opening this file type. This is usually the case of some internal data files, caches, temporary files etc.
How to convert:
As far as we know, this .00_ file type can't be converted to any other file format. This is usually the case of system, configuration, temporary, or data files containing data exclusive to only one software and used for its own purposes. Also some proprietary or closed file formats cannot be converted to more common file types in order to protect the intellectual property of the developer, which is for example the case of some DRM-protected multimedia files.