SAN FRANCISCO - Wells Fargo & Co. announced late Monday that it has completed the conversion of its California branches to the computer systems that the San Francisco banking company has used since it was bought by Norwest Corp. of Minneapolis in late 1998.

The California conversion, the $263.5 billion-asset banking company's largest in the two years since it started to convert old Wells Fargo and Norwest branches, affected the accounts of 8.6 million customers and 970 banking locations.

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