.FN3 | Software Publishing Corporation (SPC) | Skrifttypefiler | Harvard Graphics 3.0 Font File | Harvard Graphics Presentation Software | Software Publishing Corporation (SPC) |
.MA3 | Software Publishing Corporation (SPC) | Udviklerfiler | Harvard Graphics Macro | Harvard Graphics Presentation Software | Software Publishing Corporation (SPC) |
.PPL | Open Source | Udviklerfiler | Free Pascal Dynamic Library | Harvard Graphics Presentation Software | Software Publishing Corporation (SPC) |
.PR4 | Software Publishing Corporation (SPC) | Datafiler | Harvard Graphics Presentation | Harvard Graphics Presentation Software | Software Publishing Corporation (SPC) |
.PRS | Software Publishing Corporation (SPC) | Datafiler | Harvard Graphics Presentation | Harvard Graphics Presentation Software | Software Publishing Corporation (SPC) |
.SH3 | Software Publishing Corporation (SPC) | Datafiler | Harvard Graphics 3.0 Presentation File | Harvard Graphics Presentation Software | Software Publishing Corporation (SPC) |
.TP3 | Software Publishing Corporation (SPC) | Sideopsætningsfiler | Harvard Graphics DOS Template File | Harvard Graphics Presentation Software | Software Publishing Corporation (SPC) |