Sort of. There are two other numeral systems I know of that are still being used: Chinese (used in Chinese, Japanese, and to a lesser extent Korean) and Khmer (

Sort of. There are two other numeral systems I know of that are still being used: Chinese (used in Chinese, Japanese, and to a lesser extent Korean) and Khmer (used in Khmer/Cambodian, Thai, and Lao). Literate people in places that use those numeral systems know and use Arabic numerals too, but the Chinese and Khmer numerals are in no danger of dying out anytime soon. And even in the English-speaking world, we still use Roman numerals in certain contexts.