.H C/C++/Objective-C Header File .H0 Archivo de Magix Music Studio .H10 At Home Canada 2010 Tax Return .H11 At Home Canada 2011 Tax Return .H12 At Home Canada 2012 Tax Return .H1Q Microsoft Help Merged Query Index File .H1S Windows Assistance Platform Help File .H264 Archivo de video codificado en H.264 .H2O Battle Realms Game Data File .H3M Heroes 3 Map File .H4R Heroes of Might and Magic IV Data File .HA HA Compressed Archive .HAL HansaWorld Application Language File .HAM Descent 2 Resource File .HAS Haskell Script .HBC HyperBac Compressed Archive .HBC2 HyperBac Compressed File Archive .HBE HyperBac Compressed and Encrypted Archive .HBK Mathcad Handbook File .HBX BinHex Encoded File .HCC HydroCAD Prefab Chamber Data File .HCE HydroCAD Hydrograph Data File .HCF Compact Ham Library .HCI HydroCAD IDF Data File .HCL HotDocs Clause Archive .HCP HydroCAD Project File .HCR HydroCAD Rainfall Curve Data File .HCU Hydrograph Units Definitons File .HCX ChartXL Chart .HD2 Poser Hand Pose File 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