The backslash ( ) is a typographical mark (glyph) used chiefly in computing. It was first introduced in 1960 by Bob Bemer.^[1] Sometimes called a reverse solidus, it is the mirror image of the common slash. It is also known as a slosh.^[2] In colloquial speech, it is sometimes called a whack (however that term is considered to be properly a synonym only for the forward slash).^[3] variant glyphs representing the character a (allographs of a) in the Zapfino typeface. ... RAM (Random Access Memory) Look up computing in Wiktionary, the free dictionary. ... Year 1960 (MCMLX) was a leap year starting on Friday (link will display full calendar) of the Gregorian calendar. ... Robert William Bemer (February 8, 1920 – June 22, 2004) was a computer scientist best known for his work at IBM during the late 1950s and early 1960s. ... Due to technical limitations, /. redirects here. ... Synonyms (in ancient Greek, συν (syn) = plus and όνομα (onoma) = name) are different words with similar or identical meanings. ... A solidus, oblique or slash, /, is a punctuation mark. ...

Other common terms for the character include hack, escape (from C/UNIX), reverse slash, backslant, and backwhack. Also, it is sometimes referred as bash, <reverse slant>, reversed virgule, or [backslat].^[4] Look up hack, hacking in Wiktionary, the free dictionary. ... Look up escape in Wiktionary, the free dictionary. ... This article is about the Unix shell. ...

Usage

On Unix systems, and in many programming languages such as C and Perl, the backslash is used to indicate that the character following it should be treated specially. It is sometimes referred to as a knock-down or escape character, though this risks confusion with the character generated by the Esc key. In various regular expression languages it acts as a switch, changing literal characters into metacharacters and vice versa. The backslash is used similarly in the TeX typesetting system and in RTF files to begin markup tags. Filiation of Unix and Unix-like systems Unix (officially trademarked as UNIX®, sometimes also written as or ® with small caps) is a computer operating system originally developed in 1969 by a group of AT&T employees at Bell Labs including Ken Thompson, Dennis Ritchie and Douglas McIlroy. ... A programming language is an artificial language that can be used to control the behavior of a machine, particularly a computer. ... C is a general-purpose, block structured, procedural, imperative computer programming language developed in 1972 by Dennis Ritchie at the Bell Telephone Laboratories for use with the Unix operating system. ... Wikibooks has a book on the topic of Perl Programming Perl is a dynamic programming language created by Larry Wall and first released in 1987. ... In computing and telecommunication, an escape character is one which has a special meaning in a sequence of characters. ... A computer keyboard. ... In computing, a regular expression is a string that is used to describe or match a set of strings, according to certain syntax rules. ... A metacharacter is a character that has a general meaning instead of a literal meaning in a regular expression. ... TeX (IPA: as in Greek, often in English; written with a lowercase e in imitation of the logo) is a typesetting system created by Donald Knuth. ... This article or section is in need of attention from an expert on the subject. ... The Rich Text Format (often abbreviated to RTF) is a proprietary document file format developed by Microsoft in 1987 for cross-platform document interchange. ...

In the context of line-oriented text, especially source code for some programming languages, it is often used at the end of a line to indicate that the trailing newline character should be ignored, so that the following line is treated as if it were part of the current line. In this context it may be called a "continuation". Source code (commonly just source or code) is any series of statements written in some human-readable computer programming language. ... A programming language is an artificial language that can be used to control the behavior of a machine, particularly a computer. ... In computing, a newline is a special character or sequence of characters signifying the end of a line of text. ...

In DOS and Microsoft Windows, the backslash as well as the forward slash are used as the delimiter between directories and filenames in path expressions. This is in contrast to Unix and Internet URLs (web addresses), which only use the forward slash. In an early version of DOS, which did not support directories and thus had no need for a path delimiter, the forward slash was used to introduce command-line options (in Unix, the hyphen ["-"] is used for this purpose.) When directories were introduced to DOS, another character had to be chosen to be able to represent the delimiter, and the backslash was selected.^[5] This article is about the family of closely related operating systems for the IBM PC compatible platform. ... “Windows” redirects here. ... A path is the general form of a file or directory name, giving a files name and its unique location in a file system. ... A Uniform Resource Locator, URL (spelled out as an acronym, not pronounced as earl), or Web address, is a standardized address name layout for resources (such as documents or images) on the Internet (or elsewhere). ... Due to technical limitations, /. redirects here. ...

The backslash's prominence in Microsoft Windows' path names might explain why the forward slashes in URLs are occasionally (and erroneously) read out loud as "backslash". It has even led to its erroneous placement in contexts not relating to directories, or computers at all, for that matter. URLs always exclusively contain slashes. A Uniform Resource Locator, URL (spelled out as an acronym, not pronounced as earl), or Web address, is a standardized address name layout for resources (such as documents or images) on the Internet (or elsewhere). ... Due to technical limitations, /. redirects here. ...

In the Japanese ISO 646 encoding (a 7-bit code based on ASCII), the code point that would be used for backslash in ASCII is instead a yen mark (¥), while on Korean computer keyboards, the backslash corresponds to the won symbol (₩ or W). Many Japanese environments nonetheless treat it like a backslash, causing confusion.^[6] To add to the confusion, some fonts, like MS Mincho, render the backslash character as a ¥, so the Unicode characters 00A5 (¥) and 005C () look almost identical when these fonts are selected. ISO 646 is an ISO standard that specifies a 7 bit character code from which several national standards are derived, the best known of which is ASCII. Since the portion of ISO 646 shared by all countries specified only the letters used in the English alphabet, other countries using the... Image:ASCII fullsvg There are 95 printable ASCII characters, numbered 32 to 126. ... The Universal Character Set (UCS) is a character encoding that is defined by the international standard ISO/IEC 10646. ... Japanese 10 yen coin (obverse) showing Phoenix Hall of Byodoin Yen is the currency used in Japan. ... A 104-key PC US English QWERTY keyboard layout The Dvorak Simplified Keyboard layout A standard Hebrew keyboard showing both Hebrew and QWERTY. A computer keyboard is a peripheral partially modelled after the typewriter keyboard. ... World Opponent Network or WON was an online gaming service, created by Sierra Games as the Sierra Internet Gaming System (SIGS). ... The Unicode Standard, Version 5. ...

In mathematics, a backslash-like symbol is used for the set difference. For other meanings of mathematics or uses of math and maths, see Mathematics (disambiguation) and Math (disambiguation). ... In set theory and other branches of mathematics, two kinds of complements are defined, the relative complement and the absolute complement. ...

In some dialects of the BASIC programming language, the backslash is used as an operator symbol to indicate whole-number division. This article is about the programming language. ... In mathematics, especially in elementary arithmetic, division is an arithmetic operation which is the inverse of multiplication. ...

In MATLAB, the backslash is used for left matrix divide, while the slash is for right matrix divide. Not to be confused with Matlab Upazila in Chandpur District, Bangladesh. ... In mathematics, a matrix (plural matrices) is a rectangular table of elements (or entries), which may be numbers or, more generally, any abstract quantities that can be added and multiplied. ...

Originally, the backslash was intended to be able to form half of the symbols / and /. It has been suggested that and/or be merged into this article or section. ... OR logic gate In mathematics, logical disjunction (usual symbol or) is a logical operator that results in true if either of the operands is true. ...

See also

• ¥
• ₩

¥ ¥9 Chinese price sticker ¥ is a currency sign used for the following currencies: Chinese yuan (CNY) Japanese yen (JPY) The base unit of the two currencies above share the same Chinese character (圓/元/円), pronounced yuan in Mandarin Chinese and en in Standard Japanese. ... ₩ is a currency sign that is used for the following currencies: North Korean won South Korean won Woolong, a fictional currency in Cowboy Bebop Category: ...

References

what does this means ....the correct technical word Image:Macq4TH 3D NEW.jpg The Macquarie Dictionary, 4th edition. ...

External links

• Larry Osterman (2005-06-24), Why is the DOS path character ""?
• Bob Bemer, How ASCII got its backslash
• Backslash Definition by The Linux Information Project (LINFO)