Data In. Data Out. I have seen very little of exactly which databases are being integrated. I saw a reference a few days ago that there were many arguments abo

Data In. Data Out. I have seen very little of exactly which databases are being integrated. I saw a reference a few days ago that there were many arguments about using SSN in the system. Does that mean that some of systems being pinged for data don't use it? Very hard with SSN, I can't imagine trying to wing a match with similar name, similar address, similar birthday.