At PARC Chuck Geschke and John Warnock designed the Interpress device-independent page description language supported by Xerox printers and other systems, including Interlisp-D. This work was the foundation for PostScript, which Geschke and Warnock developed at their startup Adobe after leaving PARC.
For a comprehensive introduction to Interpress see:
https://openlibrary.org/works/OL5092854W/Interpress_the_source_book?edition=key%3A/books/OL2527858M

