HDR:
This extension can be one of the following:
- Apollo HDRU
- ArcInfo Binary
- ArcView Header File (ESRI)
- Egret Data File
- InstallShield Setup Header (InstallShield Software Corporation)
- MicroSim PCBoard Hole-Drill Schedule Report
- PC-File+ Database Header
- Photoshop (Adobe)
- Procomm Plus Message Header
