File Extensions Abbreviations and Acronyms

1. HCL
   Hotdocs Clause Archive
2. HCOM
   Sound (Macintosh)
3. HCP
   Hydrocad Project File
4. HCR
   Hydrocad Rainfall Curve Data File
5. HCR
   Half-fold Card File
6. HCU
   Hydrograph Units Definitons File
7. HCX
   Chartxl Chart
8. HDA
   Hotdocs Auto-assemble File
9. HDB
   Hansaworld Database File
10. HDD
    Parallels Desktop Hard Disk File
11. HDF
    Hierarchical Data Format File
12. HDI
    Hotdocs Auto-install File
13. HDI
    Hard Disk Image
14. HDK
    Hotdocs Registration File
15. HDL
    Alternate download file listing (Procomm Plus)
16. HDL
    Hotdocs Library File
17. HDM
    Hdml File
18. HDML
    Handheld Device Markup Language File
19. HDMP
    Windows Heap Dump
20. HDP
    Magix Hard Disk Project Audio File

Last updated: March 20, 2022 — Total entries: 12,444