[reference links] TI-85 INSTRUCTIONS (similar to TI-86): http://www.ti.com/calc/docs/86guide.htm cool TI-85 page with good graphics: http://www.ti.com/calc/docs/link85.htm directions: http://www.math.okstate.edu/~aichele/GrCalcs/TI-85%20TLS/TI-85TLS.html