In the 2012 TED Talk above, Terry Moore traces the use of the letter x in algebra to the Arabic word al-shalan, which means “the unknown thing,” claiming that, in translations of the writing ...

"The case of capital letters was always kept above that of the smaller ones—hence, uppercase and lower case," Drogin added. A digitized archived version of the 1825 book " Typographia ...

Aside from the fact that there are uppercase and lowercase letters in the alphabet, there are other cases that you didn't know about,' Chen said of the intriguing nature of language. Related Posts: ...

The letter has its obvious appeals. X is a versatile shape — one of the few capital letters to remain symmetrical whether bisected vertically or horizontally (the others: H, O and I).