A tag is a keyword or label that categorizes your question with other, similar questions. Using the right tags makes it easier for others to find and answer your question.
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c#× 474056
a multi-paradigm programming language encompassing strong typing, imperative, declarative, functional, generic, object-oriented (class-based), and component-oriented programming disciplines.
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java× 432804
an object-oriented language and runtime environment (JRE). Java programs are platform independent, because they are compiled to bytecode and their execution is handled by a Virtual Machine cal…
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php× 402251
an open-source server-side scripting language widely used in web development. Use this tag for questions about PHP classes, methods, functions, syntax and use.
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javascript× 391300
a dynamically-typed language commonly used for client-side scripting, but (despite the name) is NOT related to Java. Use this tag for questions regarding ECMAScript and its dialects/imp…
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![]() Google's software stack for mobile devices. Please use the Android-specific tags such as [android-intent], not [intent]. For non-developer questions, see http://android.stackexchange.com.
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jquery× 324476
a cross-browser JavaScript library that facilitates DOM traversal, event handling, animation and AJAX interactions.
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c++× 207020
a widely-used, statically-typed, free-form, compiled, multi-paradigm, multi-level, imperative, general-purpose, object-oriented programming language based on C.
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python× 195488
a dynamically and strongly typed programming language whose design philosophy emphasizes code readability. Two significantly different versions of Python (2 and 3) are in use. Please mention…
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html× 177872
the principal markup language used for structuring web pages and formatting content. The most recent iteration of HTML is HTML5.
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iphone× 175177
Specific to Apple's iPhone and/or iPod touch, but inapplicable to iPad. For questions not dependent on hardware, use the "iOS" tag. Another tag to consider is "cocoa-touch" (but not "cocoa"). Please r…
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asp.net× 174027
a web application framework developed by Microsoft to allow programmers to build dynamic web sites and web applications.
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mysql× 170265
an open-source, relational database management system.
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.net× 156727
a software framework designed mainly for the Microsoft Windows operating system. It includes an implementation of the Base Class Library, Common Language Runtime (commonly referr…
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ios× 152948
Apple's operating system for mobile devices, such as the iPhone, iPod touch, iPad and Apple TV (2nd generation) devices. It shares a lot with Mac OS X, but is optimized for touch-based interfac…
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css× 138295
a language used to control the visual presentation of HTML and XML documents including (but not limited to) colors, layout and fonts.
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objective-c× 137916
should be used only on questions that are about Objective-C features or depend on code in the language. The tags "cocoa" and "cocoa-touch" should be used to ask about Apple's frameworks or cl…
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sql× 137720
a language for querying databases. Questions should include code examples and table structure. This tag refers to the standard language, not for questions about spec…
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ruby-on-rails× 118507
an open source full-stack web application framework written in Ruby. It follows the popular MVC framework model and is known for its "convention over configuration" approach to applic…
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c× 98525
a general-purpose computer programming language used for operating systems, games and other high performance work and is clearly distinct from C++. It was developed in 1972 by Dennis Ritchie for …
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ruby× 74973
an open-source dynamic object-oriented interpreted language created by Yukihiro Matsumoto (Matz) in 1993.
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sql-server× 68959
a relational database management system from Microsoft. Use this tag for all SQL Server editions including Compact, Express, Azure, FastTrack and PDW.
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wpf× 65612
a subsystem for rendering user interfaces in Windows-based applications.
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xml× 65178
a structured document format that defines human- and machine-readable encoding rules.
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ajax× 64101
a technique for creating seamless interactive websites via asynchronous data exchange between client and server. AJAX facilitates communication with the serve…
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asp.net-mvc× 61271
a Microsoft web application framework that implements the model-view-controller (MVC) pattern. The latest release of the framework
offers REST-style web services develop…
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regex× 60746
Regular expressions (often shortened to "regex") are a declarative language used for pattern matching within strings. Please also include a tag specifying the programming language or tool you are usin…
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database× 56913
an organized collection of data.
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xcode× 54639
Apple's integrated development environment (IDE). This tag should only be used for questions about Xcode itself, and not for general Mac or iOS programming topics. Use [cocoa] for Mac program…
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arrays× 54440
an ordered data structure consisting of a collection of elements (values or variables), each identified by one (single dimensional array, or vector) or multiple indexes.
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linux× 53793
specific to the GNU/Linux operating system. If your question has nothing to do with Linux APIs or Linux-specific behaviour then do not use this tag, even if you are running on L…
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django× 53182
an open source Web 2.0 application framework, written in Python. Its primary goal is to ease the creation of complex database-driven websites.
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windows× 50089
a family of client, server, and mobile operating systems, developed by Microsoft. If your question has nothing to do with Windows APIs or Windows-specific behaviour then do not use this tag…
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vb.net× 48104
an object-oriented computer programming language that can be viewed as an evolution of Microsoft's Visual Basic 6 (VB6) but implemented on the Microsoft .NET Framework.
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json× 48012
a lightweight data exchange format inspired by JavaScript object literals. It is often used with JavaScript, Ajax, and RESTful web services but is completely langu…
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eclipse× 45454
an open source IDE with plugins available to support a large variety of languages. This tag should only be used for questions about the Eclipse IDE and not for generalized programming topic…
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ruby-on-rails-3× 44430
an open-source web development framework written in Ruby. Ruby on Rails follows the principle of convention over configuration, freeing you from having to re-invent things to stay pro…
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