Tesla CEO Elon Musk introduces the Model X car at the company's headquarters on Sept. 29, 2015, in Fremont, Calif. Marcio Jose Sanchez/AP hide caption toggle caption Marcio Jose Sanchez/AP Technology A brief biography of 'X,' the letter that Elon Musk has plastered everywhere May 12, 2023 • From X.com to X Corp., the letter X holds "great sentimental value" to billionaire Elon Musk, according to his biographers.
