Why a Billion Is Not Always the Same: Short Scale vs. Long Scale

https://digithorizon.focalledger.com/posts/why-a-billion-is-not-always-the-same-short-scale-vs.-long-scale

The discrepancy arises because English-speaking countries historically used the long scale, where a billion equals a million million (10^12), but the US shifted to the short scale, making a billion a thousand million (10^9). This difference affects large-number comprehension and is particularly relevant for international finance, scientific data, and global news.