Definition: Arabic script was originally developed by Greeks in the 5th century BC, but it's still used today in Arabic-speaking areas worldwide. UTF-8 encoding is an ASCII standard that allows for character codes to be encoded as UTF-16 or UTF-32, which is more efficient and widely supported than other encoding schemes like UTF-8 and UTF-7. The word "ar_utf8" refers to a specific type of Unicode encoding known as UTF-8.