A credit score is a numerical calculation of a person's creditworthiness, based on information from accounts, such as credit cards, loans and mortgages; public records, such as tax liens or bankruptcies; and inquiries by lenders to view the person's credit. The credit scores that most lenders use are FICO scores, so called because software developed by Fair Isaac and Company produces these scores. FICO Scores The three credit bureaus in the...