Definition of Microsoft Data Access Components (MDAC) in The Network Encyclopedia.
What is MDAC (Microsoft Data Access Components)?
A set of technologies that provide access to information in a variety of sources. Developers can use these components in client/server and Web-based situations. Microsoft Data Access Components (MDAC) includes the following:
ActiveX Data Objects (ADO), a simplified interface to OLE DB
OLE DB, a low-level interface to multiple types of data sources including relational databases, ISAM, spreadsheets, and delimited text files
Open database connectivity (ODBC), a standard interface to relational data sources