unix.
emacs:
- C-x C-f open file
- C-x C-c exit
- C-x C-s save
- C-x C-l load lisp

lisp: also can be loaded by:
start: /opt/acl60/alisp
exit:  C-z
load file: (load "filename")
after loading a file, can call its defined functions.

e.g.:
http://www2.hawaii.edu/~nreed/ics313/lisp/Hanoi.lisp

[7] CL-USER(11): (load "Hanoi.lisp")
[8] CL-USER(15): (towers 4 1 2)

lisp:
http://www2.hawaii.edu/~nreed/ics313/lisp/index.html
http://cs.gmu.edu/~sean/lisp/LispTutorial.html
http://mypage.iu.edu/~colallen/lp/lp.html
http://www-users.cs.umn.edu/~gini/lisp/emacs-for-allegro
http://xahlee.org/emacs/elisp_basics.html