The description below is from the book DOS the
Easy Way by Everett Murdock Ph.D.
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for information about downloading the book.
Type: Internal (6.0 and later)
NUMLOCK=on|off
Purpose: Used in the CONFIG.SYS file to specify the state of the
NumLock
key.
Discussion
NUMLOCK=on causes the NumLock key to be ON (the number keys on the keypad
will be active) upon system start-up. NUMLOCK=off causes the cursor keys on
the keypad to be active.
For more information about the NUMLOCK command, see Chapter 6, Tips for Advanced Users, in the downloadable book DOS the Easy Way.