.ARH File Extension

File created by ProTool, a program used to configure and monitor machine processes; stores all project settings in a compressed archive; used for reducing the amount of storage space needed to save all project data.

ARH files can be opened in ProTool and saved as uncompressed projects, which use the ".pdb" extension.

Project file created by ArheoStratigraf, a program used to create diagrams of archeological digs; contains all project settings, drawings, pictures and other dig information; used to store project data from an archeology dig.