The Wikipedia entry https://en.wikipedia.org/wiki/Forth_(programming_language) https://en.wikipedia.org/wiki/Forth_(programming_language) is terse but matches w

The Wikipedia entry https://en.wikipedia.org/wiki/Forth_(programming_language) https://en.wikipedia.org/wiki/Forth_(programming_language) is terse but matches what I've read elsewhere over the years: Forth is both easy to implement and yields very compact binaries, so it has been favored as the first environment implemented on new hardware, and as the controller for satellites. This has become less important as resource constraints ease. Forth's progeny PostScript continues unabated. Humans tend not to code directly in PDF format, as that is grave-digging. The "specification" has many geological layers (the earliest are easiest to code in) and no verification or even machine-readable definition, so one is at the mercy of testing PDF files with multiple applications. All the problems associated with Markdown, only on steroids. But one can easily write code that generates valid PostScript, and have the results translated to PDF.