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Difference between JDO and DAO?

807605Jul 13 2007 — edited Jul 15 2007

hi,
I'm learning java. I want to know what is JDO and it's use? what is DAO and it's use? what is DTO and it's use? and what are the differences between these three?
Thank You.

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Locked on Aug 12 2007

Added on Jul 13 2007

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