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. If something else is
given that is recognized, shows help on the recognizer. You
can then use the same keys and commands as after using
locate (see Locating source code definitions).
authors ( – ) gforth-1.0 “authors”
show the list of authors
license ( – ) gforth-0.2 “license”
print the license statement