Excel - 2 Lists - I want to find unique records!

[funkylad20]

I have 2 lists of numbers in Excel (6 digits each number).
Some of these numbers appear in both lists.
Some numbers only appear in one list.
I would like to cross-reference these lists and create another list of the singular, unique records.
I have done this before but cannot remember how I did it!
Sorry, posted this in 'technology' general too...forget the 'computer' drop down here!

[mxyzptlk]

http://spreadsheetpage.com/index.php/tips/

This link may be helpful for excel tips and work methods