Gforth has a simple, text-based online help system.
help ( "rest-of-line" – ) gforth-1.0 “help”
If no name is given, show basic help. If a documentation node
name is given followed by "::", show the start of the node. If
the name of a word is given, show the documentation of the word
if it exists, or its source code if not. Use g to enter
the editor at the point shown by help.
open command addr u, and read in the result
authors ( – ) gforth-1.0 “authors”
show the list of authors
license ( – ) gforth-0.2 “license”
print the license statement