raph (2006-06-07). "Ghostscript leading edge is now GPL!". Archived from the original on 2016-10-03. Retrieved 2021-03-19."I have some great news to report. The leading edge of Ghostscript development is now under GPL license, as is the latest release, Ghostscript 8.54."
Komarinski, Mark F. (March 1, 1998). "GNU Ghostscript: The Swiss Army Knife of Graphics Programs". Linux Journal. Retrieved May 29, 2026. Explaining Ghostscript's architecture as a fully accessible PostScript language interpreter based on the Forth programming concepts, allowing it to function as an interactive programming environment.{{cite journal}}: CS1 maint: postscript (link)
raph (2006-06-07). "Ghostscript leading edge is now GPL!". Archived from the original on 2016-10-03. Retrieved 2021-03-19."I have some great news to report. The leading edge of Ghostscript development is now under GPL license, as is the latest release, Ghostscript 8.54."