Keypads; Using The Embedded Numeric Keypad - HP Compaq Series Hardware And Software Manual

Keypads

The notebook has an embedded numeric keypad and also
supports an optional external numeric keypad or an optional
external keyboard that includes a numeric keypad.

Using the Embedded Numeric Keypad

The 15 keys of the embedded numeric keypad can be used like
the keys on an external keypad. When the embedded numeric
keypad is turned on, each key on the keypad performs the
function indicated by the icon in the upper-right corner of the key.
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Hardware and Software Guide
Component
fn
key
Num lock light
num lk
key
Embedded numeric keypad
Pointing Devices and Keyboard
3–19