Use Bloomberg, available on select computers in the Business Library.

• Type the ticker symbol of the company you want, hit the yellow <CORP> key, then type CRPR and hit <GO>. Bonds are listed by Bloomberg composite ratings.
• To see Moody's, S&P and Fitch ratings, click on individual bond issues and choose DES from the menu. You can find historical bond ratings for particular issues.

Use Mergent Online. Select the Bond search tab.

S&P Global Ratings are available in Net Advantage (Standard and Poor's). Select Credit Ratings under Fixed Income from the company profile.