In this web article, the author explores the evolution of checkboxes and radio buttons in different operating systems. They note that while the design of checkboxes has remained square throughout the years, radio buttons have traditionally been circular. The author highlights the introduction of rounded rectangles in Apple’s Mac OS 3 in 1986 but mentions that it was quickly resolved. However, the author expresses frustration with the web design community, which tends to reinvent and redesign these controls, leading to confusion and the breaking of conventions. The article concludes by mentioning that Apple is abandoning the square checkbox tradition in their new visionOS, which signifies the end of this long-standing convention.
https://tonsky.me/blog/checkbox/