Vertical barThe vertical bar, , is a glyph with various uses in mathematics, computing, and typography. It has many names, often related to particular meanings: Sheffer stroke (in logic), pipe, bar, or (literally the word "or"), vbar, and others. The vertical bar is used as a mathematical symbol in numerous ways: absolute value: , read "the absolute value of x" cardinality: , read "the cardinality of the set S" or "the length of a string S". conditional probability: , read "the probability of X given Y" determinant: , read "the determinant of the matrix A".
EmoticonAn emoticon (əˈmoʊtəkɒn, , rarely ɪˈmɒtɪkɒn, ), short for "emotion icon", is a pictorial representation of a facial expression using characters—usually punctuation marks, numbers, and letters—to express a person's feelings, mood, or reaction, without needing to describe it in detail. The first ASCII emoticons are generally credited to computer scientist Scott Fahlman, who proposed what came to be known as "smileys" - :-) and :-( - in a message on the bulletin board system (BBS) of Carnegie Mellon University in 1982.
RebolRebol (ˈrɛbəl ; historically REBOL) is a cross-platform data exchange language and a multi-paradigm dynamic programming language designed by Carl Sassenrath for network communications and distributed computing.
ApostropheThe apostrophe ( or ) is a punctuation mark, and sometimes a diacritical mark, in languages that use the Latin alphabet and some other alphabets. In English, the apostrophe is used for two basic purposes: The marking of the omission of one or more letters, e.g. the contraction of "do not" to "don't". The marking of possessive case of nouns (as in "the eagle's feathers", "in one month's time", "the twins' coats"). It is also used in a few distinctive cases for the marking of plurals, e.g. "p's and q's" or Oakland A's.
DelimiterA delimiter is a sequence of one or more characters for specifying the boundary between separate, independent regions in plain text, mathematical expressions or other data streams. An example of a delimiter is the comma character, which acts as a field delimiter in a sequence of comma-separated values. Another example of a delimiter is the time gap used to separate letters and words in the transmission of Morse code. In mathematics, delimiters are often used to specify the scope of an operation, and can occur both as isolated symbols (e.
AcronymAn acronym is a word or name consisting of parts of the full name's words. Initialisms or alphabetisms are acronyms formed from the string of initials which are usually pronounced as individual letters, as in the FBI (Federal Bureau of Investigation). But acronyms sometimes use syllables instead, as in Benelux (short for Belgium, the Netherlands, and Luxembourg), NAPOCOR (National Power Corporation), and TRANSCO (National Transmission Corporation). They can also be a mixture, as in radar (Radio Detection And Ranging) and MIDAS (Missile Defense Alarm System).
JSONJSON (JavaScript Object Notation, pronounced ˈdʒeɪsən; also ˈdʒeɪˌsɒn) is an open standard file format and data interchange format that uses human-readable text to store and transmit data objects consisting of attribute–value pairs and arrays (or other serializable values). It is a common data format with diverse uses in electronic data interchange, including that of web applications with servers. JSON is a language-independent data format. It was derived from JavaScript, but many modern programming languages include code to generate and parse JSON-format data.
Percent signThe percent sign (sometimes per cent sign in British English) is the symbol used to indicate a percentage, a number or ratio as a fraction of 100. Related signs include the permille (per thousand) sign and the permyriad (per ten thousand) sign (also known as a basis point), which indicate that a number is divided by one thousand or ten thousand, respectively. Higher proportions use parts-per notation. English style guides prescribe writing the percent sign following the number without any space between (e.
Space (punctuation)In writing, a space () is a blank area that separates words, sentences, syllables (in syllabification) and other written or printed glyphs (characters). Conventions for spacing vary among languages, and in some languages the spacing rules are complex. Inter-word spaces ease the reader's task of identifying words, and avoid outright ambiguities such as "now here" vs. "nowhere". They also provide convenient guides for where a human or program may start new lines.
Parallel (operator)The parallel operator (also known as reduced sum, parallel sum or parallel addition) (pronounced "parallel", following the parallel lines notation from geometry) is a mathematical function which is used as a shorthand in electrical engineering, but is also used in kinetics, fluid mechanics and financial mathematics. The name parallel comes from the use of the operator computing the combined resistance of resistors in parallel.
