159 relations: Abacus, Ada (programming language), ALGOL 68, Algorithm, ANSI escape code, Arthur C. Clarke, ASCII, Assembly language, Associated Universities, Inc., AT&T Corporation, Base32, Base64, BASIC, BBC BASIC, Bendix G-15, Binary code, Binary number, Bit, Bitwise operation, Bourne shell, Brookhaven National Laboratory, Byte, C (programming language), C Sharp (programming language), C++, Calculator (Windows), Cascading Style Sheets, Central processing unit, Character encoding, Chinese units of measurement, Circumference, Classical compound, COBOL, Commodore BASIC, Common Lisp, Communications of the ACM, Compute!, Computers and Typesetting, Computing, CTAN, Cube, Cyclic number, Decimal, Diagonal, Diameter, Digit (anatomy), Donald Knuth, Dozen, Duodecimal, E (mathematical constant), ..., Elektronika B3-34, Escape character, Etymology, Euler–Mascheroni constant, Euro sign, Europe, Floating point, Floating-point unit, Forth (programming language), FreeBASIC, GameMaker: Studio, Godot (game engine), Golden ratio, Graphical user interface, Greek language, Gross (unit), Harmonic series (mathematics), Hex dump, Hex editor, Hexadecimal time, IBM i, IBM System i, IBM System z, IEEE floating point, International scientific vocabulary, IPv6 address, Java (programming language), JavaScript, Job Control Language, Joint Army/Navy Phonetic Alphabet, Latin, LGP-30, Locomotive BASIC, Macintosh, Macintosh startup, Macron, Mathematics, Memory address, Microsoft BASIC, Microsoft Windows, MIME, Modern Greek, Modula-2, MOS Technology 6502, Motorola, MSX BASIC, NATO phonetic alphabet, Natural logarithm, Nibble, Numeral system, Numeric character reference, Numeric keypad, Object Pascal, Octal, Octet (computing), Pascal (programming language), Pi, Pixel, PL/I, Positional notation, PostScript, Power of two, Prime factor, Printf format string, Processor register, Programmable calculator, Prouhet–Thue–Morse constant, Python (programming language), QuickBASIC, Quoted-printable, Radix, Rational number, Rectangle, Repeating decimal, Scientific notation, Sexagesimal, Signedness, Smalltalk, Square, Square number, Square root of 2, Square root of 3, Square root of 5, Suanpan, Tael, The Art of Computer Programming, TI-89 series, Transaction Processing Facility, Two's complement, Unicode, Uniform Resource Identifier, Uniform Resource Locator, Unix, Unix-like, Verilog, VHDL, Vigesimal, Visual Basic, VSE (operating system), Windows PowerShell, X Window System, XHTML, XML, Z/OS, Z/VM, 1728 (number), 2 (number), 20 (number), 7400 series. Expand index (109 more) »

## Abacus

The abacus (plural abaci or abacuses), also called a counting frame, is a calculating tool that was in use centuries before the adoption of the written modern numeral system and is still widely used by merchants, traders and clerks in Asia, Africa, and elsewhere.

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## Ada (programming language)

Ada is a structured, statically typed, imperative, wide-spectrum, and object-oriented high-level computer programming language, extended from Pascal and other languages.

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## ALGOL 68

ALGOL 68 (short for ALGOrithmic Language 1968) is an imperative computer programming language that was conceived as a successor to the ALGOL 60 programming language, designed with the goal of a much wider scope of application and more rigorously defined syntax and semantics.

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## Algorithm

In mathematics and computer science, an algorithm is a self-contained step-by-step set of operations to be performed.

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## ANSI escape code

In computing, ANSI escape codes (or escape sequences) are a method using in-band signaling to control the formatting, color, and other output options on video text terminals.

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## Arthur C. Clarke

Sri Lankabhimanya Sir Arthur Charles Clarke, CBE, FRAS The award of Knight Bachelor carries the title of "Sir" and no post-nominal letters (see) meaning that the previous post-nominals, "CBE" are also still used.

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## ASCII

ASCII, abbreviated from American Standard Code for Information Interchange, is a character-encoding scheme (the IANA prefers the name US-ASCII).

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## Assembly language

An assembly language (or assembler language) is a low-level programming language for a computer, or other programmable device, in which there is a very strong (generally one-to-one) correspondence between the language and the architecture's machine code instructions.

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## Associated Universities, Inc.

Associated Universities, Inc. (AUI) is a research management corporation that builds and operates facilities for the research community.

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## AT&T Corporation

AT&T Corp., originally the American Telephone and Telegraph Company, is the subsidiary of AT&T that provides voice, video, data, and Internet telecommunications and professional services to businesses, consumers, and government agencies.

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## Base32

Base32 is one of several base 32 transfer encodings using a 32-character subset of the twenty-six letters A–Z and ten digits 0–9.

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## Base64

Base64 is a group of similar binary-to-text encoding schemes that represent binary data in an ASCII string format by translating it into a radix-64 representation.

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## BASIC

BASIC (an acronym for Beginner's All-purpose Symbolic Instruction Code) is a family of general-purpose, high-level programming languages whose design philosophy emphasizes ease of use.

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## BBC BASIC

BBC BASIC is a programming language, developed in 1981 as a native programming language for the MOS Technology 6502 based Acorn BBC Micro home/personal computer, mainly by Sophie Wilson.

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## Bendix G-15

The Bendix G-15 computer was introduced in 1956 by the Bendix Corporation, Computer Division, Los Angeles, California.

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## Binary code

A binary code represents text or computer processor instructions using the binary number system's two binary digits, 0 and 1.

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## Binary number

In mathematics and digital electronics, a binary number is a number expressed in the binary numeral system, or base-2 numeral system, which represents numeric values using two different symbols: typically 0 (zero) and 1 (one).

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## Bit

A bit is the basic unit of information in computing and digital communications.

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## Bitwise operation

In digital computer programming, a bitwise operation operates on one or more bit patterns or binary numerals at the level of their individual bits.

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## Bourne shell

The Bourne shell (sh) is a shell, or command-line interpreter, for computer operating systems.

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## Brookhaven National Laboratory

Brookhaven National Laboratory (BNL) is a United States national laboratory located in Upton, New York, on Long Island, and was formally established in 1947 at the site of Camp Upton, a former U.S. Army base.

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## Byte

The byte is a unit of digital information that most commonly consists of eight bits.

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## C (programming language)

C (as in the letter ''c'') is a general-purpose, imperative computer programming language, supporting structured programming, lexical variable scope and recursion, while a static type system prevents many unintended operations.

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## C Sharp (programming language)

C#By convention, a number sign is used for the second character in normal text; in artistic representations, sometimes a true sharp sign is used: C♯.

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## C++

C++ (pronounced as cee plus plus) is a general-purpose programming language.

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## Calculator (Windows)

Calculator is a software calculator included in all versions of Windows.

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## Cascading Style Sheets

Cascading Style Sheets (CSS) is a style sheet language used for describing the presentation of a document written in a markup language.

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## Central processing unit

A central processing unit (CPU) is the electronic circuitry within a computer that carries out the instructions of a computer program by performing the basic arithmetic, logical, control and input/output (I/O) operations specified by the instructions.

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## Character encoding

In computing, a character encoding is used to represent a repertoire of characters by some kind of an encoding system.

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## Chinese units of measurement

Chinese units of measurement are the customary and traditional units of measure used in China.

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## Circumference

Circumference (from Latin circumferentia, meaning "carrying around") is the linear distance around the edge of a closed curve or circular object.

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## Classical compound

Classical compounds and neoclassical compounds are compound words composed from combining forms (which act as affixes or stems) derived from classical Latin or ancient Greek roots.

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## COBOL

COBOL (an acronym for common business-oriented language) is a compiled English-like computer programming language designed for business use.

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## Commodore BASIC

Commodore BASIC, also known as PET BASIC, is the dialect of the BASIC programming language used in Commodore International's 8-bit home computer line, stretching from the PET of 1977 to the C128 of 1985.

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## Common Lisp

Common Lisp (CL) is a dialect of the Lisp programming language, published in ANSI standard document ANSI INCITS 226-1994 (R2004) (formerly X3.226-1994 (R1999)).

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## Communications of the ACM

Communications of the ACM is the monthly magazine of the Association for Computing Machinery (ACM).

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## Compute!

Compute! was an American computer magazine that was published from 1979 to 1994, though it can trace its origin to 1978 in Len Lindsay's PET Gazette, one of the first magazines for the Commodore PET computer.

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## Computers and Typesetting

Computers and Typesetting is a 5-volume set of books by Donald Knuth published in 1986 describing the TeX and Metafont systems for digital typography.

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## Computing

Computing is any goal-oriented activity requiring, benefiting from, or creating algorithmic processes—e.g. through computers.

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## CTAN

CTAN (an acronym for "Comprehensive TeX Archive Network") is the authoritative place where TeX related material and software can be found for download.

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## Cube

In geometry, a cube is a three-dimensional solid object bounded by six square faces, facets or sides, with three meeting at each vertex.

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## Cyclic number

A cyclic number is an integer in which cyclic permutations of the digits are successive multiples of the number.

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## Decimal

The decimal numeral system (also called base 10 or occasionally denary) has ten as its base.

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## Diagonal

In geometry, a diagonal is a line segment joining two nonconsecutive vertices of a polygon or polyhedron.

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## Diameter

In geometry, the diameter of a circle is any straight line segment that passes through the center of the circle and whose endpoints lie on the circle.

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## Digit (anatomy)

A digit is one of several most distal parts of a limb, such as fingers or toes, present in many vertebrates.

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## Donald Knuth

Donald Ervin Knuth (born January 10, 1938) is an American computer scientist, mathematician, and professor emeritus at Stanford University.

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## Dozen

A dozen (common abbreviated doz or dz) is a grouping of twelve.

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## Duodecimal

The duodecimal system (also known as base 12 or dozenal) is a positional notation numeral system using twelve as its base.

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## E (mathematical constant)

The number is an important mathematical constant that is the base of the natural logarithm.

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## Elektronika B3-34

Elektronika B3-34 (Cyrillic: Электроника Б3-34) was a very popular Soviet programmable calculator.

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## Escape character

In computing and telecommunication, an escape character is a character which invokes an alternative interpretation on subsequent characters in a character sequence.

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## Etymology

Etymology is the study of the history of words, their origins, and how their form and meaning have changed over time.

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## Euler–Mascheroni constant

The Euler–Mascheroni constant (also called Euler's constant) is a mathematical constant recurring in analysis and number theory, usually denoted by the lowercase Greek letter gamma (\gamma).

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## Euro sign

The euro sign (€) is the currency sign used for the euro, the official currency of the Eurozone in the European Union (EU).

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## Europe

Europe is a continent that comprises the westernmost part of Eurasia.

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## Floating point

In computing, floating point is the formulaic representation which approximates a real number so as to support a trade-off between range and precision.

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## Floating-point unit

A floating-point unit (FPU, colloquially a math coprocessor) is a part of a computer system specially designed to carry out operations on floating point numbers.

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## Forth (programming language)

Forth is an imperative stack-based computer programming language and programming environment.

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## FreeBASIC

FreeBASIC is a multiplatform, free/open source (GPL) BASIC compiler for Microsoft Windows, protected-mode DOS (DOS extender), Linux, FreeBSD and Xbox.

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## GameMaker: Studio

GameMaker: Studio (originally named Animo and later Game Maker) is a proprietary game creation system created by Mark Overmars in the Delphi programming language.

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## Godot (game engine)

Godot is a 2D and 3D cross-platform open source MIT licensed game engine developed by OKAM Studio.

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## Golden ratio

In mathematics, two quantities are in the golden ratio if their ratio is the same as the ratio of their sum to the larger of the two quantities.

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## Graphical user interface

In computer science, a graphical user interface or GUI, pronounced ("gooey") is a type of interface that allows users to interact with electronic devices through graphical icons and visual indicators such as secondary notation, as opposed to text-based interfaces, typed command labels or text navigation.

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## Greek language

Greek or Hellenic (Modern Greek: ελληνικά, elliniká, "Greek", ελληνική γλώσσα, ellinikí glóssa, "Greek language") is an independent branch of the Indo-European family of languages, native to the southern Balkans, the Aegean Islands, western Asia Minor, parts of northern and Eastern Anatolia and the South Caucasus, southern Italy, Albania and Cyprus.

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## Gross (unit)

In English and related languages, several terms involving the words "great" or "gross" (possibly, from grosse thick) relate to numbers involving multiples of exponents of twelve (dozen).

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## Harmonic series (mathematics)

In mathematics, the harmonic series is the divergent infinite series: Its name derives from the concept of overtones, or harmonics in music: the wavelengths of the overtones of a vibrating string are 1/2, 1/3, 1/4, etc., of the string's fundamental wavelength.

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## Hex dump

In computing, a hex dump is a hexadecimal view (on screen or paper) of computer data, from RAM or from a file or storage device.

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## Hex editor

A hex editor (or binary file editor or byte editor) is a type of computer program that allows for manipulation of the fundamental binary data that constitutes a computer file.

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## Hexadecimal time

Hexadecimal time is the representation of the time of day as a hexadecimal number in the interval.

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## IBM i

IBM i is an EBCDIC-based operating system that runs on IBM Power Systems and on IBM PureSystems.

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## IBM System i

The IBM System i is IBM's previous generation of midrange computer systems for IBM i users, and was subsequently replaced by the IBM Power Systems in April 2008.

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## IBM System z

IBM System z (officially "IBM z Systems") is a family name used by IBM for all of its mainframe computers.

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## IEEE floating point

The IEEE Standard for Floating-Point Arithmetic (IEEE 754) is a technical standard for floating-point computation established in 1985 by the Institute of Electrical and Electronics Engineers (IEEE).

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## International scientific vocabulary

International scientific vocabulary (ISV) comprises scientific and specialized words whose language of origin may or may not be certain, but which are in current use in several modern languages.

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## IPv6 address

An Internet Protocol Version 6 address (IPv6 address) is a numerical label that is used to identify a network interface of a computer or other network node participating in an IPv6 computer network.

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## Java (programming language)

Java is a general-purpose computer programming language that is concurrent, class-based, object-oriented, and specifically designed to have as few implementation dependencies as possible.

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## JavaScript

JavaScript is a high level, dynamic, untyped, and interpreted programming language.

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## Job Control Language

Job Control Language (JCL) is a name for scripting languages used on IBM mainframe operating systems to instruct the system on how to run a batch job or start a subsystem.

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## Joint Army/Navy Phonetic Alphabet

The Joint Army/Navy Phonetic Alphabet was a radio alphabet developed in 1941 and was used by all branches of the United States military until the promulgation of the ICAO spelling alphabet (Alfa, Bravo) in 1956, which replaced it.

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## Latin

Latin (Latin: lingua latīna) is a classical language belonging to the Italic branch of the Indo-European languages.

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## LGP-30

The LGP-30, standing for Librascope General Purpose and then Librascope General Precision, was an early off-the-shelf computer.

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## Locomotive BASIC

Locomotive Basic is a proprietary dialect of the BASIC programming language written by Locomotive Software used only on the Amstrad CPC (where it was built-in on ROM).

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## Macintosh

The Macintosh (branded as Mac since 1998) is a series of personal computers (PCs) designed, developed, and marketed by Apple Inc. Steve Jobs introduced the original Macintosh computer on January 24, 1984.

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## Macintosh startup

The Macintosh startup sequence behaviors include the startup chime, Happy Mac, Sad Mac and Chimes of Death.

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## Macron

A macron is a diacritical mark, a straight bar placed above a letter, usually a vowel.

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## Mathematics

Mathematics (from Greek μάθημα máthēma, “knowledge, study, learning”) is the study of topics such as quantity (numbers), structure, space, and change.

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## Memory address

In computing, memory address is a data concept used at various levels by software and hardware to access the computer's primary storage memory.

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## Microsoft BASIC

Microsoft BASIC is the foundation product of the Microsoft company.

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## Microsoft Windows

Microsoft Windows (or simply Windows) is a metafamily of graphical operating systems developed, marketed, and sold by Microsoft.

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## MIME

Multipurpose Internet Mail Extensions (MIME) is an Internet standard that extends the format of email to support.

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## Modern Greek

Modern Greek (νέα ελληνικά or νεοελληνική γλώσσα "Neo-Hellenic", historically and colloquially also known as Ρωμαίικα "Romaic" or "Roman", and Γραικικά "Greek") refers to the dialects and varieties of the Greek language spoken in the modern era.

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## Modula-2

Modula-2 is a computer programming language designed and developed between 1977 and 1985 by Niklaus Wirth at the Swiss Federal Institute of Technology in Zurich (ETH Zurich) as a revision of Pascal to serve as the sole programming language for the operating system and application software for the personal workstation Lilith.

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## MOS Technology 6502

The MOS Technology 6502 (pronounced "sixty-five-oh-two") William Mensch and the moderator both pronounce the 6502 microprocessor as "sixty-five-oh-two".

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## Motorola

Motorola, Inc. was a multinational telecommunications company based in Schaumburg, Illinois, United States (U.S.). After having lost $4.3 billion from 2007 to 2009, the company was divided into two independent public companies, Motorola Mobility and Motorola Solutions on January 4, 2011.

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## MSX BASIC

MSX BASIC is a dialect of the BASIC programming language.

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## NATO phonetic alphabet

The International Radiotelephony Spelling Alphabet, commonly known as the NATO phonetic alphabet and also known as the ICAO phonetic or spelling alphabet and the ITU phonetic alphabet, is the most widely used spelling alphabet.

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## Natural logarithm

The natural logarithm of a number is its logarithm to the base e, where ''e'' is an irrational and transcendental constant approximately equal to.

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## Nibble

In computing, a nibble (often nybble or even nyble to match the vowels of byte) is a four-bit aggregation, or half an octet.

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## Numeral system

A numeral system (or system of numeration) is a writing system for expressing numbers, that is, a mathematical notation for representing numbers of a given set, using digits or other symbols in a consistent manner.

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## Numeric character reference

A numeric character reference (NCR) is a common markup construct used in SGML and SGML-derived markup languages such as HTML and XML.

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## Numeric keypad

A numeric keypad, number pad, numpad, or ten key, is the palm-sized, 17-key section of a standard computer keyboard, usually on the far right.

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## Object Pascal

Object Pascal refers to a branch of object-oriented derivatives of Pascal, mostly known as the primary programming language of Embarcadero Delphi.

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## Octal

The octal numeral system, or oct for short, is the base-8 number system, and uses the digits 0 to 7.

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## Octet (computing)

An octet is a unit of digital information in computing and telecommunications that consists of eight bits.

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## Pascal (programming language)

Pascal is a historically influential imperative and procedural programming language, designed in 1968–1969 and published in 1970 by Niklaus Wirth as a small and efficient language intended to encourage good programming practices using structured programming and data structuring. A derivative known as Object Pascal designed for object-oriented programming was developed in 1985.

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## Pi

The number is a mathematical constant, the ratio of a circle's circumference to its diameter, commonly approximated as 3.14159.

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## Pixel

In digital imaging, a pixel, pel, or picture element is a physical point in a raster image, or the smallest addressable element in an all points addressable display device; so it is the smallest controllable element of a picture represented on the screen.

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## PL/I

PL/I ("Programming Language One", pronounced) is a procedural, imperative computer programming language designed for scientific, engineering, business and systems programming applications.

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## Positional notation

Positional notation or place-value notation is a method of representing or encoding numbers.

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## PostScript

PostScript (PS) is a computer language for creating vector graphics.

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## Power of two

In mathematics, a power of two means a number of the form where is an integer, i.e. the result of exponentiation with number two as the base and integer as the exponent.

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## Prime factor

In number theory, the prime factors of a positive integer are the prime numbers that divide that integer exactly.

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## Printf format string

Printf format string (of which "printf" stands for "print formatted") refers to a control parameter used by a class of functions in the string-processing libraries of various programming languages.

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## Processor register

In computer architecture, a processor register is a small amount of storage available as part of a digital processor, such as a central processing unit (CPU).

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## Programmable calculator

Programmable calculators are calculators that can automatically carry out a sequence of operations under control of a stored program, much like a computer.

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## Prouhet–Thue–Morse constant

In mathematics, the Prouhet–Thue–Morse constant, named for Eugène Prouhet, Axel Thue, and Marston Morse, is the number—denoted by \tau—whose binary expansion.01101001100101101001011001101001...

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## Python (programming language)

Python is a widely used general-purpose, high-level programming language.

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## QuickBASIC

Microsoft QuickBASIC (also QB) is an Integrated Development Environment (or IDE) and compiler for the BASIC programming language that was developed by Microsoft.

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## Quoted-printable

Quoted-Printable, or QP encoding, is an encoding using printable ASCII characters (alphanumeric and the equals sign ".

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## Radix

In mathematical numeral systems, the radix or base is the number of unique digits, including zero, used to represent numbers in a positional numeral system.

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## Rational number

In mathematics, a rational number is any number that can be expressed as the quotient or fraction p/q of two integers, p and q, with the denominator q not equal to zero.

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## Rectangle

In Euclidean plane geometry, a rectangle is any quadrilateral with four right angles.

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## Repeating decimal

A repeating or recurring decimal is a way of representing rational numbers in base 10 arithmetic.

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## Scientific notation

Scientific notation (also referred to as "standard form" or "standard index form") is a way of expressing numbers that are too big or too small to be conveniently written in decimal form and is commonly used by scientists, mathematicians and engineers.

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## Sexagesimal

Sexagesimal (base 60) is a numeral system with sixty as its base.

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## Signedness

In computing, signedness is a property of data types representing numbers in computer programs.

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## Smalltalk

Smalltalk is an object-oriented, dynamically typed, reflective programming language.

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## Square

In geometry, a square is a regular quadrilateral, which means that it has four equal sides and four equal angles (90-degree angles, or right angles).

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## Square number

In mathematics, a square number or perfect square is an integer that is the square of an integer; in other words, it is the product of some integer with itself.

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## Square root of 2

The square root of 2, written in mathematics as or 2^, is the positive algebraic number that, when multiplied by itself, gives the number 2.

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## Square root of 3

The square root of 3 is the positive real number that, when multiplied by itself, gives the number 3.

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## Square root of 5

The square root of 5 is the positive real number that, when multiplied by itself, gives the prime number 5.

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## Suanpan

The Suan Pan is an abacus of Chinese origin first described in a 190 CE book of the Eastern Han Dynasty, namely Supplementary Notes on the Art of Figures written by Xu Yue.

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## Tael

Tael (at the OED Online.) or tahil can refer to any one of several weight measures of the Far East.

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## The Art of Computer Programming

The Art of Computer Programming (sometimes known by its initials TAOCP) is a comprehensive monograph written by Donald Knuth that covers many kinds of programming algorithms and their analysis.

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## TI-89 series

The TI-89 and the TI-89 Titanium are graphing calculators developed by Texas Instruments (TI).

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## Transaction Processing Facility

TPF is an IBM real-time operating system for mainframe computers descended from the IBM System/360 family, including zSeries and System z9.

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## Two's complement

Two's complement is a mathematical operation on binary numbers, as well as a binary signed number representation based on this operation.

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## Unicode

Unicode is a computing industry standard for the consistent encoding, representation, and handling of text expressed in most of the world's writing systems.

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## Uniform Resource Identifier

In computing, a Uniform Resource Identifier (URI) is a string of characters used to identify the name of a resource.

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## Uniform Resource Locator

A Uniform Resource Locator (URL) (commonly informally referred to as a web address, although the term is not defined identically) is a reference to a web resource that specifies its location on a computer network and a mechanism for retrieving it.

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## Unix

Unix (all-caps UNIX for the trademark) is a family of multitasking, multiuser computer operating systems that derive from the original AT&T Unix, developed in the 1970s at the Bell Labs research center by Ken Thompson, Dennis Ritchie, and others.

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## Unix-like

A Unix-like (sometimes referred to as UN*X or *nix) operating system is one that behaves in a manner similar to a Unix system, while not necessarily conforming to or being certified to any version of the Single UNIX Specification.

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## Verilog

Verilog, standardized as IEEE 1364, is a hardware description language (HDL) used to model electronic systems.

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## VHDL

VHDL (VHSIC Hardware Description Language) is a hardware description language used in electronic design automation to describe digital and mixed-signal systems such as field-programmable gate arrays and integrated circuits.

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## Vigesimal

The vigesimal or base 20 numeral system is based on twenty (in the same way in which the ordinary decimal numeral system is based on ten).

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## Visual Basic

Visual Basic is a legacy third-generation event-driven programming language and integrated development environment (IDE) from Microsoft for its COM programming model first released in 1991.

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## VSE (operating system)

z/VSE (Virtual Storage Extended) is an operating system for IBM mainframe computers, the latest one in the DOS/360 lineage, which originated in 1965.

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## Windows PowerShell

Windows PowerShell is a task automation and configuration management framework from Microsoft, consisting of a command-line shell and associated scripting language built on the.NET Framework.

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## X Window System

The X Window System (X11, X, and sometimes informally X-Windows) is a windowing system for bitmap displays, common on UNIX-like computer operating systems.

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## XHTML

Extensible Hypertext Markup Language (XHTML) is part of the family of XML markup languages.

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## XML

vs.) Extensible Markup Language (XML) is a markup language that defines a set of rules for encoding documents in a format which is both human-readable and machine-readable. It is defined by the W3C's XML 1.0 Specification and by several other related specifications, all of which are free open standards. The design goals of XML emphasize simplicity, generality and usability across the Internet. It is a textual data format with strong support via Unicode for different human languages. Although the design of XML focuses on documents, it is widely used for the representation of arbitrary data structures such as those used in web services. Several schema systems exist to aid in the definition of XML-based languages, while many application programming interfaces (APIs) have been developed to aid the processing of XML data.

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## Z/OS

z/OS is a 64-bit operating system for IBM mainframes, produced by IBM.

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## Z/VM

z/VM is the current version in IBM's VM family of virtual machine operating systems.

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## 1728 (number)

1728 is the natural number following 1727 and preceding 1729.

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## 2 (number)

2 (Two) is a number, numeral, and glyph.

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## 20 (number)

20 (twenty) is the natural number following 19 and preceding 21.

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## 7400 series

The 7400 series of transistor–transistor logic (TTL) integrated circuits are the most popular family of TTL integrated circuit logic.

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## References

[1] https://en.wikipedia.org/wiki/Hexadecimal