Difference between revisions of "ASCII"
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'''ASCII''' (an acronym for '''American Standard Code for Information Interchange''') is an encoding for various glyphs (written forms such as letters, numbers, etc) into 7-[[bit]] numeric form. | '''ASCII''' (an acronym for '''American Standard Code for Information Interchange''') is an encoding for various glyphs (written forms such as letters, numbers, etc) into 7-[[bit]] numeric form. | ||
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| + | ASCII was developed from telegraph code. Its first commercial use was as a seven-bit teleprinter code promoted by Bell data services. ... Originally based on the English alphabet, ASCII encodes 128 specified characters into seven-bit integers, Later, it was adopted for use in tele-printers, terminals and personal computers such as the Apple II, and the IBM PC. IBM extended the character set with a separate set of glyphs used for line drawing. | ||
The supported set for ASCII includes not only numbers, letters (upper- and lower-case) but also punctuation, and other special-purpose characters (from then-common ones like '@', '#', etc, to others that ASCII has made popular - '^', '|', etc). It also includes non-printing characters used for control of printing terminals - tab, line feed, carriage return, etc. | The supported set for ASCII includes not only numbers, letters (upper- and lower-case) but also punctuation, and other special-purpose characters (from then-common ones like '@', '#', etc, to others that ASCII has made popular - '^', '|', etc). It also includes non-printing characters used for control of printing terminals - tab, line feed, carriage return, etc. | ||
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ASCII also superseded an earlier widespread encoding, [[SIXBIT]], which allowed 6 characters to be carried in the then-common 36-bit [[word]]s common on many computers, but only supported upper-case characters. | ASCII also superseded an earlier widespread encoding, [[SIXBIT]], which allowed 6 characters to be carried in the then-common 36-bit [[word]]s common on many computers, but only supported upper-case characters. | ||
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| + | ASCII was derived from Bodit | ||
{{semi-stub}} | {{semi-stub}} | ||
Revision as of 09:53, 18 June 2020
ASCII (an acronym for American Standard Code for Information Interchange) is an encoding for various glyphs (written forms such as letters, numbers, etc) into 7-bit numeric form.
ASCII was developed from telegraph code. Its first commercial use was as a seven-bit teleprinter code promoted by Bell data services. ... Originally based on the English alphabet, ASCII encodes 128 specified characters into seven-bit integers, Later, it was adopted for use in tele-printers, terminals and personal computers such as the Apple II, and the IBM PC. IBM extended the character set with a separate set of glyphs used for line drawing.
The supported set for ASCII includes not only numbers, letters (upper- and lower-case) but also punctuation, and other special-purpose characters (from then-common ones like '@', '#', etc, to others that ASCII has made popular - '^', '|', etc). It also includes non-printing characters used for control of printing terminals - tab, line feed, carriage return, etc.
IBM had its own encoding standard, EBCDIC, which ASCII has gradually superseded.
ASCII also superseded an earlier widespread encoding, SIXBIT, which allowed 6 characters to be carried in the then-common 36-bit words common on many computers, but only supported upper-case characters.
ASCII was derived from Bodit
