Harvard Graphics (originally named Harvard Presentation Graphics) was a presentation and vector graphics program, used mainly on the MS-DOS platform. Technical information about its file formats is difficult to find.
Some of the file formats used by Harvard Graphics are listed here, by file extension.
- .CHT - Chart (vector graphics)
- .CH3 - Chart (v3)
- .SHW - Presentation (v2)
- .SH3 - Presentation (v3)
- .PRS - Presentation (Harvard Graphics for Windows)
- .PR4 - Presentation
- .SYM - Symbol (v2)
- .SY3 - Symbol file (v3)
- .PL - Palette
- .PL3 - Chart palette (v3)
- .PC3 - Custom palette (v3)
- .FN3 - Font (v3)
- Speedo (.SPD) - Font format supported by Harvard Graphics 3.0
- 2345.ZIP - Contains some .SYM and .CHT files.
- HGRAPH1.ZIP, HVDGRAF1.ZIP, SYM6.ZIP