Original 991es 2nd Edition Scientific Calculator

Two way power 417 functions full dot display plastic keys integration / differential equation calculation matrix calculations / vector calculations complex number calculation calc function / solve function base-n calculation fraction calculation combination and permutation logarithm log list-based stat data editor standard deviation paired-variable statistics regression analysis logical operations table function 40 scientific constants 40 metric conversions (20 conversion pairs) 9 variable memories comes with new slide on hard case we sell at wholesale and retail.