Harvard Graphics

File Format
Name	Harvard Graphics
Ontology	Electronic File Formats Document Presentation Harvard Graphics
Extension(s)	.cht, .ch3, .shw, .sh3, .pr4, .sym, .sy3, others
PRONOM	x-fmt/32, x-fmt/101, x-fmt/324, x-fmt/325
Released	1986

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.

Formats

Some of the file formats used by Harvard Graphics are listed here, by file extension.

• .CHT - Chart (vector graphics) - x-fmt/325
• .CH3 - Chart (v3) - x-fmt/32
• .SHW - Show (v2) - x-fmt/324
• .SH3 - Show (v3) - x-fmt/101
• .PRS - Presentation (v1-3) - fmt/1491
• .PR4 - Presentation (v4) - fmt/1492
• .SYM - Symbol (v2)
• .SY3 - Symbol file (v3)
• .PL - Palette
• .PL3 - Chart palette (v3)
• .PC3 - Custom palette (v3)
• .FN3 - Font (v3)

Related formats

• Speedo (.SPD) - Font format supported by Harvard Graphics 3.0

Software

• Canvas

Sample files

• 2345.ZIP - Contains some .SYM and .CHT files.
• HMMWV.ZIP
• POLIT.ZIP
• HGRAPH1.ZIP, HVDGRAF1.ZIP, SYM6.ZIP
• https://telparia.com/fileFormatSamples/image/harvardGraphicsChart/

Links

• Wikipedia: Harvard Graphics
• Harvard Graphics File Format Summary, from the Encyclopedia of Graphics File Formats