Final answer:
The name used to identify Fannie Mae's Automated Underwriting System is Desktop Underwriter (DU).
Step-by-step explanation:
The name used to identify Fannie Mae's Automated Underwriting System is Desktop Underwriter (DU). DU is a computer-based system that helps mortgage lenders make loan eligibility decisions by assessing the borrower's credit and financial information. It uses an automated process to analyze the borrower's credit score, income, and other factors to determine if they qualify for a mortgage loan.