Almost All File Formats and their Meanings

H

H C program header
HED HighEdit document
HEL Microsoft Hellbender saved game
HEX Macintosh BinHex 2.0 file
**L HP Graphics Language drawing
HLP Help file
HOG Lucas Arts Dark Forces WAD file
HPJ Visual Basic Help Project
HPP C++ program header
HQX Macintosh BinHex 4.0 file
HST History file
HT HyperTerminal
HTM Hypertext document
HTML Hypertext document
HTX Extended HTML template