R:Base System V r1.1

Released in 1986 by Microrim Inc
For DOS

Image quality: Unmodified/write protected

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.