NEW YORK (Standard&Poor's CreditWire) March 16, 2000--Standard&Poor's today raised its senior unsecured debt rating for Olsten Corp. to triple-'B'-plus from triple-'B'-minus and removed ratings from CreditWatch, where they were placed on Aug. 19, 1999. The upgrade is based on the closing of Adecco S.A.'s acquisition of Olsten's staffing and information technology services businesses and the strengthening in credit quality that results from the combination. Standard&Poor's analyzes these entities on a consolidated basis. The triple-'B'-minus bank loan rating for Olsten Corp. was withdrawn in light of the repayment of the company's bank loans. In addition, Standard&Poor's withdrew its triple-'B'-minus corporate credit rating for the company. These ratings also are removed from CreditWatch. The