Would someone be so kind as to explain the difference between MDAC and the Jet Engine?

I create several small applications in Delphi 7 and I often need to share them with others.

In Delphi, for the connection, I select Microsoft Jet 4.0 OLE DB provider.

I know that I can freely download MDAC from Microsoft. However, on the download page, Microsoft specifically says -

"This release does not include Microsoft Jet, the Microsoft Jet OLE DB Provider or ODBC driver, the Desktop Database ODBC Drivers, or the Visual FoxPro ODBC Driver."

So, If I install MDAC 2.8 on a computer that has nothing but Windows 2000 Professional or Win XP Professional installed, will my Delphi applications run, or do I need something else?