HP 48gII - Manual (Page 264)

Page 8-9
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: