A pis file extension is related to the PS2DIS program. A pis file stores project.
PIS file extension - PS2DIS project
What is pis file? How to open pis files?
File type specification:
The pis file extension is associated with the PS2DIS.
The PS2DIS is an application, that is used to disassembling Sony PlayStation 2 applications.
The pis file contains project from PS2DIS.
This pis 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.