The second half of the ASCII character set (characters 128 through 255). Designed in the 1960s, ASCII was originally a 7-bit code (0 through 127). To accommodate foreign languages, the DOS code set added various characters; however, more than 200 extended ASCII encodings were developed. The Unicode character encoding was created to handle every language on the planet (see Unicode
The DOS Code Page for the U.S.
In DOS and Windows, extended ASCII characters can be entered by holding down the Alt key and entering the extended ASCII number on the numeric keypad on the keyboard.