Today in Tedium, Ernie explores the surprisingly overlooked topic of the red circle and slash symbol, a common but seldom discussed sign of negation. Used in various ways, it’s an easy tool to add visual language to existing content. With origins dating back to European road signage efforts in the 1930s, the symbol has evolved over the years, even making its way into popular culture through films like Ghostbusters. Despite its ubiquity, the symbol lacks a consistent name, making it challenging to research. This symbol serves as an example of how the internet can make it difficult to find information on widely used topics.
https://tedium.co/2024/03/09/red-circle-slash-no-symbol-history/