A Brief History of the Letter 'X,' From Algebra to X-Mas to Elon Musk, History

A math historian explores how "x" came to stand in for an unknown quantity

Elon Musk's history with the letter X, from SpaceX to Tesla Model X and xAI

Opinion Elon Musk rebrands with the letter X. Why? - The Washington Post

What does the letter 'X' mean? Branding experts weigh in

Elon ruining Twitter 1 change at a time : r/WhitePeopleTwitter

What does the letter 'X' mean? Branding experts weigh in

Elon Musk and the letter X, the name for his everything app : NPR

Inside Elon Musk's 25-year history and obsession with the letter X as he prepares to rename and rebrand Twitter

What does the letter 'X' mean? Branding experts weigh in

Elon Musk and the letter X, the name for his everything app : NPR

What Does X Mean to Elon Musk? - The New York Times

Catchword Branding Name review of Twitter rebrand as X