Xxx.accdb

Allows you to select more than one value in a single field (e.g., assigning multiple tags to a single record).

To build user interfaces for data entry and navigation. xxx.accdb

The .accdb format was introduced in Microsoft Office 2007 to replace the older .mdb format. It acts as a relational database management system (RDBMS) that combines the relational Microsoft Jet Database Engine with a graphical user interface and software-development tools. Allows you to select more than one value