Remember the story of Humpty Dumpty? All the King's horses and all the King's men couldn't put Humpty together again. Many IT professionals tell me that they often feel like they live in Humpty Dumpty land. Ever since the first two computer programs were written, IT has struggled with the resulting disintegration - putting the data and applications together again. Integration of data and applications across the enterprise has been the long-standing goal of many organizations; however, until recently, we have been limited in the technological help to achieve this goal.

Fortunately, we have three technologies to help with this. I call them the three E's - enterprise application integration (EAI), enterprise information integration (EII) and extract, transform and load (ETL) software.

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