PostScript Type 3 (.pt3)
The PT3 file extension stands for PostScript Type 3, a font format developed by Adobe Systems. Introduced in 1984, PostScript Type 3 fonts utilize the full PostScript language to define glyphs, allowing for advanced features like shading, color, and fill patterns. Unlike Type 1 fonts, Type 3 does not support hinting, which can affect rendering quality at smaller sizes. Despite its flexibility, Type 3 fonts are less commonly used today due to the rise of more advanced font technologies.