AVAILABLE HELP TOPICS
/h		print this list of topics
/h commands	KRC session commands
/h syntax	syntax of expressions & scripts
/h lex		lexical syntax
/h ops		prefix & infix operators
/h prelude	the standard prelude
/h lib1981	legacy prelude from 1981
/h keys		key bindings used in line editing
/h CHANGES	system changes by date
