.oem file: how to open it on Windows

3 Windows apps register the .oem extension. Install one of them to open the file with a double-click.

• 
  Notepad3

  Notepad like text editor based on the Scintilla source code.

  Free 7.26.602.1 84.4K ↓ ★ 6.7K
• P
  PSPad editor (x86)

  The Developer’s Text Editor for Microsoft Windows

  Free 5.5.2.851
• P
  PSPad editor (x64)

  The Developer’s Text Editor for Microsoft Windows

  Free 5.5.2.851

Related guide: Change the default app for a file type in Windows