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Microsoft earns significant profits from its ongoing software maintenance and support plans.
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Visa earns data processing revenues from the authorization, clearing, settlement, transaction processing services and other maintenance and support services that facilitate transaction and information processing among customers globally and Visa Europe.
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As the sole customer for the two engines, the government must cover all the costs of designing a second engine, developing and testing it, equipping and manning a second production line, funding a second supplier network, and sustaining a parallel maintenance and support infrastructure across the lifetime of the program.
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