Unsupported titles/`period`

Punctuation mark

 * 1) Indicates the end of a sentence or passage of text.
 * 2) End of abbreviation.
 * etc. — “et cetera”
 * Mr J. Smith
 * 1) Separates a number or letter from an item in a list.
 * A. New York, B. London, C. Paris.
 * a. New York, b. London, c. Paris.
 * 1. New York, 2. London, 3. Paris.
 * I. New York, II. London, III. Paris.
 * 1) Used between words, indicates paused, serious speech.
 * I. Don't. Wanna. Hear.
 * 1) Some uses associated with numbers.
 * 2) Indicates ordinal numerals
 * 4., IV. — “fourth”
 * 1)  Used after numbers, representing a cardinal number.
 * 100. — “a hundred”
 * 1)  Indicates a syllable break.
 * 2) Used in numbered section/subsection titles, separates the sections and subsections.
 * 10.1.4.6 How to make a profit
 * 10.1.4.7 How to keep your profit
 * 1) Used in numbered images, illustrations, maps, graphs, etc.
 * Map 1.4 Distribution of tigers in Africa
 * Map 1.5 Distribution of elephants in Africa
 * 1) Used repeatedly (as in: ........) in the index of a book, separates the chapter name from the page number.
 * Introduction..................................13
 * Chapter 1.....................................14
 * Chapter 2.....................................19
 * 1)  Used to separate a team's number of goals from its number of behinds, and sometimes from its total score.
 * Brisbane Lions 20.14 (134) defeated Collingwood 12.12 (84)
 * Brisbane Lions 20.14.134 defeated Collingwood 12.12.84

Usage notes
In English, the symbol . has various names, used in different contexts:


 * To signify the end of a sentence: or
 * My name is John. — My name is John period (US) or My name is John full stop (UK)
 * For use as a decimal separator:
 * 3.45 — three point four five
 * For use of a thousand separator:  —  (not pronounced)
 * There are 1.000 species left. — There are one thousand species left
 * In names in computing contexts (file-names, domain-names, and so on):
 * john.smith@example.com — john dot smith at example dot com
 * To separate the chapter name from the page number:
 * Introduction..................................13

Symbol

 * 1) A separator used with numbers.
 * 2) In some counting systems, the decimal separator.
 * 3) In some counting systems, the thousands separator.
 * 4) In various programming languages, the structure access operator.
 * point.x — “the ‘x’ property of the ‘point’ variable”
 * 1) In various programming languages, the string concatenation operator.
 * echo 'I am currently ' . myAge(1981) . ' old.';
 * 1) In various operating systems, the current directory.
 * ls . — “list the contents of the current directory”
 * 1) The class selector in CSS, which intends to format a class of an element. (a class can appear freely one or more times in a page, as opposed to the ID selector: ).
 * div.quotedtext {font-style: italic}
 * 1) A delimiter.
 * 2) Separates a file name from its extension.
 * document.txt — “the file with the base name ‘document’ and the extension ‘txt’”
 * 1) Separates the parts of the domain name of a website (including the subdomain and the top-level domain).
 * en.wiktionary.org — “the Internet domain name with components ‘en’, ‘wiktionary’, and ‘org’”
 * 1) Separates the parts of a version number.
 * version 1.2.16
 * 1) Separates the parts of an IP address (IPv4).
 * 127.0.0.1 = localhost
 * 1)  Matches any single character.
 * 1) Separates the parts of the domain name of a website (including the subdomain and the top-level domain).
 * en.wiktionary.org — “the Internet domain name with components ‘en’, ‘wiktionary’, and ‘org’”
 * 1) Separates the parts of a version number.
 * version 1.2.16
 * 1) Separates the parts of an IP address (IPv4).
 * 127.0.0.1 = localhost
 * 1)  Matches any single character.

Synonyms

 * (in some counting systems)
 * (in some counting systems)

Letter

 * 1) A short signal, used to form Morse code text, together with - (a long signal).
 * 2)  (Latin)
 * 3)  (Cyrillic)

Usage notes

 * Used when writing numbers numerically, either with Arabic or Roman numerals. Spellings like are nonstandard,  or  are used instead.
 * The ordinal for is irregular. Thus,  is pronounced  or.
 * Case endings (if required) are written immediately after the dot (see the usage example above).

Etymology
Common European practice, also used in e.g. German and also more rarely in English and Swedish.

Usage notes

 * An abbreviated word or ordinal number may stand in for any inflected form, e.g. that of the following word.
 * If the inflected form meant is important yet ambiguous or unclear, an alternative scheme for writing ordinal numbers can be used instead: for most numbers (e.g. ) and  for numbers ending in  (e.g., ), with these forms in the nominative singular, and the ending can then be inflected.
 * Used when writing numbers numerically, either with Arabic or Roman numerals.

Letter


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