the 64-bit client. With version 2007 onwards, Access includes an Office-specific version of Jet, initially called the Office Access Connectivity Engine (ACE), but which is now called the Access Database Engine (However MS-Access consultants and VBA developers who specialize in MS-Access are more likely to refer to it as "the ACE Database Engine"). This engine was backward-compatible with previous versions of the Jet engine, so it could read and write (.mdb) files from earlier Access versions. It introduced a new default file format, (.accdb), that brought several improvements to Access, including complex data types such as multivalue fields, the attachment data type and history tracking in memo fields. It also brought security changes and encryption improvements and enabled integration with Microsoft Windows SharePoint Services 3.0 and Microsoft Office Outlook 2007. It can be obtained separately. The engine in Microsoft Access 2010 discontinued support for Access 1.0, Access 2.0, Lotus 1-2-3 and Paradox files. A 64-bit version of Access 2010 and its ACE Driver/Provider was introduced, which in essence provides a 64-bit version of Jet. The driver is not part of the Windows operating system, but is available as a redistributable. The engine in Microsoft Access 2013 discontinued support for Access 95, Access 97 and xBase files, and it also discontinued support for replication. Version 1608 of Microsoft Access 2016 restored support for xBase files, and Version 1703 introduced a Large Number data type. From a data access technology standpoint, Jet is considered a deprecated technology by Microsoft, but Microsoft continues to support ACE as part of Microsoft Access. Compatibility Microsoft provides the JET drivers only for Microsoft Windows. Therefore, third party software support for JET databases is almost exclusively found on Windows. There is an open source project that attempts to enable working with JET databases on other platforms, MDB Tools and its much extended Java port named Jackcess. See also SQL Server Compact References Further reading Microsoft Jet Database Engine Programmer's Guide, Microsoft, 1995 Library of Congress, Microsoft Access MDB File Format Family Library of Congress, Microsoft Access ACCDB File Format Family Database engines Microsoft database software Proprietary database management systems