Type 1 fonts, also known as PostScript fonts, are a type of digital font used in printing and desktop publishing. They were developed by Adobe in 1984 and are now widely used on both Mac and Windows operating systems. Type 1 fonts are vector-based, which means that they use mathematical formulas to determine the shape and size of each character, rather than pixel-based bitmap images. As a result, they can be scaled to any size without losing quality. Type 1 fonts are often used in professional printing and graphic design, and are known for their precise and clean lines.