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Is there a character set other than EBCDIC that is not a superset of 7-bit ASCII?
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Non-ASCII characters are those that are not encoded in ASCII, such as Unicode, EBCDIC, etc. ASCII is limited to 128 characters and was initially developed for the English language.
The ASCII Character Set ASCII stands for the "American Standard Code for Information Interchange". It was designed in the early 60's, as a standard character set for computers and electronic devices. ASCII is a 7-bit character set containing 128 characters.
UTF-16 and UTF-32 are incompatible with ASCII files, and thus require Unicode-aware programs to display, print and manipulate them, even if the file is known to contain only characters in the ASCII subset.
Yes. JIS X 0208 is not a superset of ASCII. Some versions of this standard include most of the ASCII characters, but not all of them.
A related fact is that a file encoded with UTF-16 or UTF-32 is not byte-equivalent to an ASCII file of the same characters, but since those are not character sets, and since Unicode is certainly a superset of ASCII, they do not qualify as answers to your question.
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There were some ISO 646 derivatives that were basically ASCII, but replaced various punctuation marks with various accented characters. There were also Greek, Cyrillic, Arabic and Hebrew sets that laid those characters over the Latin characters; see http://en.wikipedia.org/wiki/ISO_646 for details.
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