dBase 5 ?<p>dBASE 3 ruled the world and then 4 made everyone switch to FoxPro and Clipper and Paradox. I don't even recall hearing the plonk when 5 hit.<p>Per wiki: "(dBASE IV) design and stability were so lacking that many users switched to other products."<p><a href="https://en.wikipedia.org/wiki/DBase" rel="nofollow">https://en.wikipedia.org/wiki/DBase</a>