<span>A nested IF function is one in which the action to be taken for the true or false case includes yet another if function.
</span>Nested function is a function which is defined within another function, in this case it is defined within the IF function, which <span>returns one value if a certain predefined condition is true and another value if the condition is false. </span>
A proprietary database is a database that is privately owned and password protected. i hope this helps!!!! :)
It Might be "EMV". An EMV Chip, if that helps
