Microsoft Equation Editor

The legacy Microsoft Equation Editor, often referred to as the 'Equation Editor 3.0', was a staple in Microsoft Office for many years. While it has been largely superseded by the modern 'Equation' tool built into Word, it remains a recognizable name in the history of mathematical software. It provided a simple, visual way to insert equations into documents. Today, it is mostly considered a legacy tool, as it lacks the advanced features, accessibility, and compatibility of modern alternatives like MathType or the native Word equation engine.

It is best used only for opening older documents.