.hrf extension

File Type Hitachi Raster Format File
File Format Proprietary (Hitachi)
Usage Open manually
Rank ★ ☆ ☆  Uncommon
Description

Bitmap image format developed by Hitachi; used to store scanner output data.
Open With
Windows

Intergraph SmartPlant Markup

Hitachi CADCore

CSU Imagenation
Updated May 18, 2010
Information from the PC File Extensions Reference
http://pc.net/extensions/file/hrf