The neural network technology company Nestor Inc. said it has been contracted by Mellon Bank Corp. to install the Prism CardAlert system.

Mellon, with a card portfolio of $1.9 billion, has been using Nestor software since 1992. Prism CardAlert will enhance the bank's ability to detect fraud, said John L. Klinck Jr., senior vice president of Mellon's credit card group.

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