In the past, DAO made working with tabular databases easier than calling dynamic-link library (DLL) functions by wrapping up those functions with objects. This made data access relatively simple for most developers. ADO uses this strength of DAO and expands on it. ADO uses OLE DB to work with data sources, so you will be able to reach many more data sources than with DAO. Many of these data sources won't be stored as traditional, tabular databases. In those cases, using DAO won't be possible. ADO is similar enough to DAO that you won't need to relearn an entire object model to handle these new data sources. Once you've learned ADO, you're ready for the future of data access.