R:Base 5.0 (Win)

R:Base, from Microrim and first released in 1983, was a popular relational database that competed with Ashton Tate's dBASE product. R:Base was the first relational database for the IBM PC, also notable as earlier relational databases typically required more powerful hardware. R:Base also includes a form and report generator that is optimized for the capabilities of the IBM PC and features the ability to add or remove fields without losing data or relationships.

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Release notes

RBase 5.0 Windows is the first version for Microsoft Windows. It maintains full compatibility with RBase 4.5 for DOS and OS/2, and adds support for graphics. The program is not very windows-like, does not offer as much as other windows databases of the time, and seems to focus entirely on backwards compatibility.

This is a 32-bit application for Windows 3.1 with Win32s.