HP 39g Graphing Calculator - Manual (Page 140)

To select a
function
3.
Function categories
Press I MATH I to display the MATH menu. The categories
appear in alphabetical order. Press 0 or to scroll
through the categories. To skip directly to a category,
press the first letter of the category’s name. Note: You do
not need to press \
alpha ] first.
The list of functions (on the right) applies to the currently
highlighted category (on the left). Use and 0 to
switch between the category list and the function list.
Highlight the name of the function you want and press
m. This copies the function name (and an initial
parenthesis, if appropriate) to the edit line.
Calculus
Complex
numbers
Constant
Hyperbolic trig
Lists
Loop
Matrices
Polynomial
Probability
Real-numbers
Stat-Two
(Two-variable
statistics)
Symbolic
Tests
Trigonometry
10-2 Using mathematical functions