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Red Hat, Inc. (NYSE: RHT), the world's leading provider of open source solutions, today announced that Bank of New Zealand, a subsidiary of the National Australia Bank Group, has deployed Red Hat Enterprise Linux 5 on IBM System z mainframes to solve environment, space and cost issues related to its data centre. With Red Hat and IBM solutions, Bank of New Zealand has significantly reduced its hardware footprint, power consumption, heat and carbon emissions and costs, including an expected 20 percent cost reduction over the life of the platform.