.PCO File

The pco file extension is mainly related to older music notation software called PComposer (not to be confused with Personal Composer) and used for its default notation project file. Looks like older program.

This pco 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.

How to open:

Use PComposer to work with *.pco files.

How to convert:

Possibly can be converted like any other project files.