Athena supports two different versions of 6.003 scheme.  They are:

- the 6.003 scheme
- the 6.003 with the Signal Handling Environment (SHE)

To use 6.001 Scheme on athena you must be on a VAX.  Then you must:

	attach scheme.old

To run scheme at the athena prompt type:

	/mit/scheme/vaxbin/<scheme-program>

where <scheme-program> is one of: 

	scm6003
	she6003

To run scheme from emacs you must first load the interface libraries, as
follows:

	M-x load-file<ret>
	/mit/scheme/dist/etc/scheme.el<ret>

	M-x load-file<ret>
	/mit/scheme/dist/etc/xscheme.el<ret>

Then to run scm6003:

	C-u M-x run-scheme<ret>
	/mit/scheme/vaxbin/scm6003-em

To use she6003 in emacs, and get it to do the right thing with the mode line
you must use:

	C-u M-x run-scheme<ret>
	/mit/scheme/6003/scm6003 -emacs -band /mit/scheme/6003/she6003.bin \
	-utab /mit/scheme/6003/utabmd.bin


To evaluate an expression inside emacs use:

	C-x C-e

To abort execution or return to the top level REPL from a error level use:

	C-c g

For more information on how to use scheme inside emacs type (in the *scheme*
buffer):

	C-h m

For more information on the scheme language look in:

	/mit/scheme/dist/documentation/*.txt

To reset the scheme process if it gets into a really bizarre state use:

	M-x reset-scheme