Casio Algebra FX 2.0 PLUS User Manual page 130

Descending order
Use the same procedure as that for the ascending order sort. The only difference is that
you should press c(SortD) in place of b(SortA).
# You can specify a value from 1 to 6 as the
number of lists for sorting.
# If you specify a list more than once for a single
sort operation, an error occurs.
An error also occurs if lists specified for sorting
do not have the same number of values (rows).
3-1-7
Inputting and Editing a List
# Specifying a value of 0 for the number of lists
causes all the lists in the file to be sorted. In
this case you specify a base list on which all
other lists in the file are sorted.
19990401