Semicolon

;؛ Semicolon [;] semi-colonspartial stopsemi-colon&#x3b;
The semicolon or semi colon is a punctuation mark that separates major sentence elements.wikipedia
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Full stop

period.periods
Although terminal marks (i.e. full stops, exclamation marks, and question marks) mark the end of a sentence, the comma, semicolon and colon are normally sentence-internal, making them secondary boundary marks.
The "middle dot" ⟨·⟩, the stigmḕ mésē, marked a division in a thought occasioning a longer breath (essentially a semicolon) and the low dot ⟨.⟩, called the hypostigmḕ or "underdot", marked a division in a thought occasioning a shorter breath (essentially a comma).

Comma

,commascomma below
Although terminal marks (i.e. full stops, exclamation marks, and question marks) mark the end of a sentence, the comma, semicolon and colon are normally sentence-internal, making them secondary boundary marks.
If the individual items of a list are long, complex, affixed with description, or themselves contain commas, semicolons may be preferred as separators, and the list may be introduced with a colon.

Question mark

????interrogation point
Although terminal marks (i.e. full stops, exclamation marks, and question marks) mark the end of a sentence, the comma, semicolon and colon are normally sentence-internal, making them secondary boundary marks.
It was adopted by Church Slavonic and eventually settled on a form essentially similar to the Latin semicolon.

Colon (punctuation)

colon:colons
Although terminal marks (i.e. full stops, exclamation marks, and question marks) mark the end of a sentence, the comma, semicolon and colon are normally sentence-internal, making them secondary boundary marks.
(This was only intermittently used, but eventually revived as the ano teleia, the modern Greek semicolon.

Serial comma

Oxford commaprecedes the final item
Between items in a series or listing containing internal punctuation, especially parenthetic commas, where the semicolons function as serial commas:
4) Its use is consistent with other means of separating items in a list (for example, when semicolons are used to separate items, a semicolon is consistently included before the last item even when and or or is present).

Punctuation

punctuation markpunctuation markspunctus
Between items in a series or listing containing internal punctuation, especially parenthetic commas, where the semicolons function as serial commas: The semicolon or semi colon is a punctuation mark that separates major sentence elements.
They have been credited with popularizing the practice of ending sentences with the colon or full stop, inventing the semicolon, making occasional use of parentheses and creating the modern comma by lowering the virgule.

C (programming language)

CC programming languageC language
In other languages, semicolons are called terminators and are required after every statement (such as in Java, and the C family).
C program source text is free-format, using the semicolon as a statement terminator and curly braces for grouping blocks of statements.

Interpunct

middle dotano teleiaĿ
To indicate a long pause or separate sections, each with commas (the semicolon's purpose in English), Greek uses, but extremely rarely, the "άνω τελεία", an interpunct .
The modern Greek ano teleia mark (άνω τελεία, ánō teleía, lit. "upper stop"), also known as the áno stigmī́, is the infrequently-encountered Greek semicolon and is properly romanized as such.

SQL

Structured Query LanguageSQL DatabasesWikibook SQL
In computer programming, the semicolon is often used to separate multiple statements (for example, in Perl, Pascal, PL/I, and SQL; see Pascal: Semicolons as statement separators).
SQL statements also include the semicolon statement terminator. Though not required on every platform, it is defined as a standard part of the SQL grammar.

INI file

INI.iniinitialisation file mapping
Other languages (for instance, some assembly languages and LISP dialects, CONFIG.SYS and INI files) use semicolons to mark the beginning of comments.
Semicolons at the beginning of the line indicate a comment.

Comma operator

operator
Of these other characters, whereas commas have continued to be widely used in programming for lists (and rare other uses, such as the comma operator that separates expressions in C), they are rarely used otherwise, and the period as the end of the program has fallen out of use.
The comma operator separates expressions (which have value) in a way analogous to how the semicolon terminates statements, and sequences of expressions are enclosed in parentheses analogously to how sequences of statements are enclosed in braces: is a sequence of expressions, separated by commas, which evaluates to the last expression while is a sequence of statements, and does not evaluate to any value.

Project Semicolon

Project Semicolon is the name of a faith-based anti-suicide initiative (since the semicolon continues a sentence rather than ending it) which has led to the punctuation mark becoming a highly symbolic and popular tattoo.
They have been known for encouraging people to tattoo the punctuation mark semicolon onto their bodies as a form of solidarity between people dealing with mental illness or death of someone from suicide.

Pascal (programming language)

PascalPascal programming languageprogramming language
In computer programming, the semicolon is often used to separate multiple statements (for example, in Perl, Pascal, PL/I, and SQL; see Pascal: Semicolons as statement separators).
Semicolons separate statements, and the full stop (i.e., a period) ends the whole program (or unit). Letter case is ignored in Pascal source.

Duodecimal

base 1212base-12
The Humphrey point is sometimes used instead of a decimal point in duodecimal numbers.
They include italicizing duodecimal numbers (54 = 64), adding a "Humphrey point" (a semicolon ";" instead of a decimal point ".") to duodecimal numbers (54; = 64.) (54;0 = 64.0), or some combination of the two.

Covariant derivative

covariant differentiationcovariant differentialtensor derivative
In differential geometry, a semicolon preceding an index is used to indicate the covariant derivative of a function with respect to the coordinate associated with that index.
Often a notation is used in which the covariant derivative is given with a semicolon, while a normal partial derivative is indicated by a comma.

CSV application support

CSV
The comma-separated values file format is a very simple data file format that is supported by almost all spreadsheet software such as Excel (although Excel uses the list separator of the current locale settings, which is a semicolon instead of a comma for many locales), Apple Numbers, OpenOffice.org Calc and Gnumeric as well as many online spreadsheet services such as EditGrid and Google Docs & Spreadsheets.

CSV application support

CSV
The comma-separated values file format is a very simple data file format that is supported by almost all spreadsheet software such as Excel (although Excel uses the list separator of the current locale settings, which is a semicolon instead of a comma for many locales), Apple Numbers, OpenOffice.org Calc and Gnumeric as well as many online spreadsheet services such as EditGrid and Google Docs & Spreadsheets.

Mixed radix

mixed-radixPrimorial number systemmixed unit arithmetic
In the tabular format, the digits are written above their base, and a semicolon indicates the radix point.

2004 in LGBT rights

2004June 15, 2004
17 – San Francisco Superior court Judge James L. Warner postpones any decision to block San Francisco from issuing marriage licenses to same-sex couples and to void the 2,464 same-sex marriages that were performed in the city since February 12. This was on the grounds that the Proposition 22 Legal Defense and Education Fund's order for San Francisco to "cease and desist issuing marriage licenses to and/or solemnizing marriages of same-sex couples; to show cause before this court..." had an improper semicolon. To do both, rather than one or the other, would have exceeded the judge's jurisdiction.

Armenian alphabet

ArmenianArmenian scriptՓ
[ ՝ ] The boot' (which looks like a comma-shaped reversed apostrophe) is used as a short stop, and placed in the same manner as the semicolon, to indicate a pause that is longer than that of a comma, but shorter than that of a colon; in many texts it is replaced by the single opening single quote (a 6-shaped, or mirrored 9-shaped, or descending-wedge-shaped elevated comma), or by a spacing grave accent.

Ancient Greek grammar

Ancient GreekgrammarGreek
Two punctuation marks are used in Greek texts which are not found in English: the colon, which consists of a dot raised above the line ( · ) and the Greek question-mark, which looks like the English semicolon ( ; ).

List (abstract data type)

listlistsvector
A list can often be constructed by writing the items in sequence, separated by commas, semicolons, and/or spaces, within a pair of delimiters such as parentheses '', brackets '[]', braces '{}', or angle brackets ''.

Slovene punctuation

Marks used in Slovene include full stops, question marks, exclamation marks, commas, semicolons, colons, dashes (–), hyphens, ellipses, different types of inverted commas and quotation marks, brackets (which are in syntactical use), as well as apostrophes, solidi, equal signs, and so forth.

Portuguese orthography

Portugueseorthography of PortuguesePortuguese letters
For letters with more than one common pronunciation, their most common phonetic values are given on the left side of the semicolon; sounds after it occur only in a limited number of positions within a word.