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Quaternary Dimension (or even 4D) occurs as relational database management system developed by Laurent Ribardière in 1984. Inside 1993, 4D Server, the client/server version of Fourth Dimension was introduced & since 1995, 4D has supported both a Microsoft Windows and Apple Macintosh operating systems.
A 4D line of products has since expanded to an SQL front-end & several productivity plug-circuit card and interfaces.
Now, 4D is maintained per French company 4D SA.
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