HP F2226A - 48GII Graphic Calculator User Manual page 264

Next, with system flag 117 set to SOFT menus:
This menu contains the following functions:
∆LIST
: Calculate increment among consecutive elements in list
ΣLIST
: Calculate summation of elements in the list
ΠLIST
: Calculate product of elements in the list
SORT : Sorts elements in increasing order
REVLIST : Reverses order of list
ADD : Operator for term-by-term addition of two lists of the same length
(examples of this operator were shown above)
Examples of application of these functions in ALG mode are shown next:
SORT and REVLIST can be combined to sort a list in decreasing order:
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