Information about 8 Bit Clean
Eight-bit clean describes a computer system that correctly handles 8-bit character sets, such as the ISO 8859 series and the UTF-8 encoding of Unicode. Up to the early 1990s, programs and communications systems assumed that all characters would be represented as numbers between 0 and 127 (7 bits), leaving the top bit of each byte free for use as a parity or flag bit. 7-bit systems are unable to handle more complex character codes, which are commonplace in non-English-speaking countries with larger alphabets.
Binary files cannot directly be transmitted through 7-bit systems. To work around this, encodings have been devised which use only 7-bit ASCII characters. The most popular of these encodings are uuencode and MIME base64. EBCDIC-based systems cannot handle all 7-bits of uuencoded data; the base64 encoding does not have this problem on legacy networks.
By the mid-1990s practically all computer and communication systems were updated to be 8-bit clean. Some communications protocols, such as SMTP (Internet e-mail), still require 7-bit data.
An alphabet is a standardized set of letters
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Binary files cannot directly be transmitted through 7-bit systems. To work around this, encodings have been devised which use only 7-bit ASCII characters. The most popular of these encodings are uuencode and MIME base64. EBCDIC-based systems cannot handle all 7-bits of uuencoded data; the base64 encoding does not have this problem on legacy networks.
By the mid-1990s practically all computer and communication systems were updated to be 8-bit clean. Some communications protocols, such as SMTP (Internet e-mail), still require 7-bit data.
References
This article was originally based on material from the Free On-line Dictionary of Computing, which is licensed under the GFDL. computer is a machine which manipulates data according to a list of instructions.
Computers take numerous physical forms. The first devices that resemble modern computers date to the mid-20th century (around 1940 - 1941), although the computer concept and various machines
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Computers take numerous physical forms. The first devices that resemble modern computers date to the mid-20th century (around 1940 - 1941), although the computer concept and various machines
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8-bit integers, memory addresses, or other data units are those that are at most 8 bits (1 octet) wide. Also, 8-bit CPU and ALU architectures are those that are based on registers, address buses, or data buses of that size.
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character is a unit of information that roughly corresponds to a grapheme, grapheme-like unit, or symbol, such as in an alphabet or syllabary in the written form of a natural language.
An example of a character is a letter, numeral, or punctuation mark.
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An example of a character is a letter, numeral, or punctuation mark.
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ISO 8859, more formally ISO/IEC 8859, is a joint ISO and IEC standard for 8-bit character encodings for use by computers. The standard is divided into numbered, separately published parts, such as ISO/IEC 8859-1, ISO/IEC 8859-2, etc.
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UTF-8 (8-bit UCS/Unicode Transformation Format) is a variable-length character encoding for Unicode. It is able to represent any character in the Unicode standard, yet the initial encoding of byte codes and character assignments for UTF-8 is backwards compatible with ASCII.
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Unicode is an industry standard allowing computers to consistently represent and manipulate text expressed in any of the world's writing systems. Developed in tandem with the Universal Character Set standard and published in book form as The Unicode Standard
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BIT is an acronym for:
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- Bannari amman Institute of Technology
- Bangalore Institute of Technology
- Beijing Institute of Technology
- Benzisothiazolinone
- Bilateral Investment Treaty
- Bhilai Institute of Technology - Durg
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byte (pronounced /baɪt/) is a unit of measurement of information storage, most often consisting of eight bits. In many computer architectures it is a unit of memory addressing.
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A parity bit is a binary digit that indicates whether the number of bits with value of one in a given set of bits is even or odd. Parity bits are used as the simplest error detecting code.
There are two types of parity bits: even parity bit and odd parity bit.
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There are two types of parity bits: even parity bit and odd parity bit.
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A bit field is a common idiom used in computer programming to store a set of Boolean datatype flags compactly, as a series of bits. The bit field is stored in an integral type of known, fixed bit-width. Each Boolean flag is stored in a separate bit.
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English}}}
Writing system: Latin (English variant)
Official status
Official language of: 53 countries
Regulated by: no official regulation
Language codes
ISO 639-1: en
ISO 639-2: eng
ISO 639-3: eng
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Writing system: Latin (English variant)
Official status
Official language of: 53 countries
Regulated by: no official regulation
Language codes
ISO 639-1: en
ISO 639-2: eng
ISO 639-3: eng
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- ABCs redirects here, for the Alien Big Cats, see British big cats.
An alphabet is a standardized set of letters
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binary file is a computer file which may contain any type of data, encoded in binary form for computer storage and processing purposes; for example, computer document files containing formatted text.
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American Standard Code for Information Interchange (ASCII), generally pronounced ask-ee IPA: /ˈæski/ ( [1] ), is a character encoding based on the English alphabet.
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Uuencoding is a form of binary-to-text encoding that originated in the Unix program uuencode, for encoding binary data for transmission over the uucp mail system. The name "uuencoding" is derived from "Unix-to-Unix encoding".
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Mime or pantomime is a theatrical medium or performance art, involving the acting out of a story by a mime artist through body motions, without use of speech.
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History
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Base64 is a positional notation using a base of 64. It is the largest power-of-two base that can be represented using single printable ASCII characters. This has led to its use as a transfer encoding for e-mail among other things.
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Extended Binary Coded Decimal Interchange Code (EBCDIC) is an 8-bit character encoding (code page) used on IBM mainframe operating systems, like z/OS, OS/390, VM and VSE, as well as IBM minicomputer operating systems like OS/400 and i5/OS (see also Binary Coded Decimal).
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computing protocols, see Protocol (computing). For protocols on two-way voice communications, see Voice procedure. For other meanings of the word protocol, see Protocol.
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Simple Mail Transfer Protocol (SMTP) is the de facto standard for e-mail transmissions across the Internet. Formally SMTP is defined in RFC 821 (STD 10) as amended by RFC 1123 (STD 3) chapter 5. The protocol used today is also known as ESMTP and defined in RFC 2821.
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GNU Free Documentation License (GNU FDL or simply GFDL) is a copyleft license for free documentation, designed by the Free Software Foundation (FSF) for the GNU project.
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This article is copied from an article on Wikipedia.org - the free encyclopedia created and edited by online user community. The text was not checked or edited by anyone on our staff. Although the vast majority of the wikipedia encyclopedia articles provide accurate and timely information please do not assume the accuracy of any particular article. This article is distributed under the terms of GNU Free Documentation License.
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