Define the following environment variables:

	ABACUS_HOME - directory where you installed the Abacus share tcl files.
	ABACUS_EDITOR - external editor to use when editing macros.
	ABACUS_BROWSER - web browser to view WWW pages and info.

e.g.:
	setenv ABACUS_HOME /usr/X11R6/share/abacus
	setenv ABACUS_EDITOR emacs
	setenv ABACUS_BROWSER netscape