NEW YORK (Standard&Poor's) May 21, 2008--Standard&Poor's Ratings Services assigned its 'AA' rating to San Antonio, Texas' electric and gas systems $289.5 million revenue bonds series 2008. At the same time, Standard&Poor's affirmed its 'AA' rating on San Antonio's $3 billion senior-lien electric and gas revenue and refunding bonds, its 'AA-/A-1+' rating on the city's $402 million electric and gas systems junior-lien revenue bonds, and its 'A-1+' rating on the city's tax-exempt commercial paper program. The commercial paper rating is linked to the long-term debt rating. The outlook on the ratings above is stable. The ratings reflect a strong, growing economy, very competitive electricity rates, economic, diverse fuel generating capacity, and strong financial metrics. However,