Microsoft Universal Data Access
An overview of Microsoft's Universal Data Access and the Microsoft Data Access Components and also includes links to the FAQ and several related whitepapers.
Pooling in the Microsoft Data Access Components
Discusses the benefits, features, and behavior of pooling within the context of the MDAC architecture, including technology-specific tips for OLE DB, ADO, and ODBC developers. (Leland Ahlbeck and Don Willits / Microsoft)