For a long time, the Base 14 fonts were proprietary. However, Adobe released them as open source, making them (free of charge) and libre (free to use/distribute).
| Standard Name (PDF) | Free Alternative (URW/Ghostscript) | Usage | | :--- | :--- | :--- | | (F1 often) | Nimbus Sans | Sans-serif standard | | Times Roman (F2 often) | Nimbus Roman | Serif standard | | Courier (F3 often) | Nimbus Mono | Monospaced standard | | Symbol / ZapfDingbats | Standard Symbols | Mathematical/Icons | cidfont f1 f2 f3 f4 gratis
The search for "CIDFont F1 F2 F3 F4 gratis" highlights a common requirement in document management: the need for reliable, cost-free font rendering. For a long time, the Base 14 fonts were proprietary