Access 2013 Query Column Headers

Recently, I was pulling data in MS Access 2013 - a Column entitled "<>" appeared in the results of my Query. What does the Column Header "<>" mean? What data is this pulling?
My Relationships are as follows: Accounts: Cost Element, Description, & Functional Area.
Cost Centers: COAr, Cost Center, Description, Valid To, & Valid From FY 2016: ID, Posting Date, G/L, Cost Center, Amount in Local Currency, & Absolute

Thank you, in advance for your anticipated prompt assistance.