Found 2 hits - Term: american standard code for information interchange, Database: *, Strategy: prefix
- [1] : WordNet (r) 2.0
american standard code for information interchange
n : computer science a code for information exchange between
computers made by different companies; a string of 7
binary digits represents each character; used in most
microcomputers syn: ascii
see also:
ascii
- [2] : The Free On-line Dictionary of Computing (27 SEP 03)
american standard code for information interchange
the basis of character sets used in almost all present-day
computers. us-ascii uses only the lower seven bits
character points 0 to 127 to convey some control codes,
space, numbers, most basic punctuation, and unaccented letters
a-z and a-z. more modern coded character sets e.g.,
latin-1, unicode define extensions to ascii for values
above 127 for conveying special latin characters like
accented characters, or german ess-tsett, characters from
non-latin writing systems e.g., cyrillic, or han
characters, and such desirable glyphs as distinct open-
and close-quotation marks. ascii replaced earlier systems
such as ebcdic and baudot, which used fewer bytes, but
were each broken in their own way.
computers are much pickier about spelling than humans; thus,
hackers need to be very precise when talking about characters,
and have developed a considerable amount of verbal shorthand
for them. every character has one or more names - some
formal, some concise, some silly.
individual characters are listed in this dictionary with
alternative names from revision 2.3 of the usenet ascii
pronunciation guide in rough order of popularity, including
their official itu-t names and the particularly silly names
introduced by intercal.
see v ampersand, asterisk, back quote, backslash,
caret, colon, comma, commercial at, control-c,
dollar, dot, double quote, equals, exclamation mark,
greater than, hash, left bracket, left parenthesis,
less than, minus, parentheses, oblique stroke,
percent, plus, question mark, right brace, right
brace, right bracket, right parenthesis, semicolon,
single quote, space, tilde, underscore, vertical
bar, zero.
some other common usages cause odd overlaps. the "", "$",
">", and "" characters, for example, are all pronounced "hex"
in different communities because various assemblers use them
as a prefix tag for hexadecimal constants in particular,
"" in many assembler-programming cultures, "$" in the 6502
world, ">" at texas instruments, and "" on the bbc micro,
acorn archimedes, sinclair, and some zilog z80
machines. see also splat.
the inability of us-ascii to correctly represent nearly any
language other than english became an obvious and intolerable
misfeature as computer use outside the us and uk became the
rule rather than the exception see software rot. and so
national extensions to us-ascii were developed, such as
latin-1.
hardware and software from the us still tends to embody the
assumption that us-ascii is the universal character set and
that words of text consist entirely of byte values 65-90 and
97-122 a-z and a-z; this is a major irritant to people who
want to use a character set suited to their own languages.
perversely, though, efforts to solve this problem by
proliferating sets of national characters produced an
evolutionary pressure especially in protocol design, e.g.,
the url standard to stick to us-ascii as a subset common
to all those in use, and therefore to stick to english as the
language encodable with the common subset of all the ascii
dialects. this basic problem with having a multiplicity of
national character sets ended up being a prime justification
for unicode, which was designed, ostensibly, to be the one
ascii extension anyone will need.
a system is described as "eight-bit clean" if it doesn't
mangle text with byte values above 127, as some older systems
did.
see also ascii character table, yu-shiang whole fish.
1995-03-06
see also:
us-ascii bit character points control codes latin-1 unicode
han characters glyphs ebcdic baudot broken
usenet itu-t intercal v ampersand
asterisk back quote backslash caret colon
comma commercial at control-c dollar dot
double quote equals exclamation mark greater than hash
left bracket left parenthesis less than minus parentheses
oblique stroke percent plus question mark right brace
right brace right bracket right parenthesis semicolon single quote
space tilde underscore vertical bar zero
hexadecimal 6502 texas instruments bbc micro acorn archimedes
sinclair zilog z80 splat misfeature software rot
url eight-bit clean ascii character table yu-shiang whole fish
Results 1 - 10 of 13 found about american standard code for information interchange: Code
>> C Words
Code, definition of term: Code
code_pag1.html Code Grinder
>> C Words
Code Grinder, definition of term: Code Grinder
code+grinder_pag1.html Country Code
>> C Words
Country Code, definition of term: Country Code
country+code_pag1.html Dead Code
>> D Words
Dead Code, definition of term: Dead Code
dead+code_pag1.html Double Standard
>> D Words
Double Standard, definition of term: Double Standard
double+standard_pag1.html Fire Code
>> F Words
Fire Code, definition of term: Fire Code
fire+code_pag1.html Draconian Code
>> D Words
Draconian Code, definition of term: Draconian Code
draconian+code_pag1.html Code Division M
>> C Words
Code Division M, definition of term: Code Division M
code+division+m_pag1.html Bar Code
>> B Words
Bar Code, definition of term: Bar Code
bar+code_pag1.html Baudot Code
>> B Words
Baudot Code, definition of term: Baudot Code
baudot+code_pag1.html
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