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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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 (not to be confused with JavaScript) is a class-based, object-oriented, strongly typed, reflective language and runtime environment (JRE). Java programs are compiled to bytecode and run in a virt…
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a dynamically-typed language commonly used for client-side scripting. Use this tag for questions regarding ECMAScript and its dialects/implementations (excluding ActionScript). Unless a …
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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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Google's OS for mobile devices. Please use Android-specific tags such as [android-intent], not [intent]. For non-developer questions, see http://android.stackexchange.com.
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a cross-browser JavaScript library that facilitates DOM traversal, event handling, animation and AJAX interactions.
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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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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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the principal markup language used for structuring web pages and formatting content. The most recent revision to the HTML specification is HTML5.
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an open-source, relational database management system.
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a web application framework developed by Microsoft to allow programmers to build dynamic web sites and web applications.
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Apple's operating system for mobile devices, such as the iPhone, iPod touch, iPad and Apple TV (2nd generation and up). Much is shared with OS X, but iOS is optimized for touch-based interfaces…
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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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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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a language for querying databases. Questions should include code examples and table structure. This tag refers to the standard language, not for questions about a sp…
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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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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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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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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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a multi-platform open-source dynamic object-oriented interpreted language created by Yukihiro Matsumoto (Matz) in 1993.
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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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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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a structured document format that defines human- and machine-readable encoding rules.
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a subsystem for rendering user interfaces in Windows-based applications.
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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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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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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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an organized collection of data typically used to model certain situations. Use this tag if you have questions about designing a database. If it is about a particular database management…
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specific to the GNU/Linux operating system. If your question has nothing to do with Linux APIs or Linux-specific behavior you should not use this tag, even if you are running on…
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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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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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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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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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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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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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Facebook Platform lets developers integrate their apps directly into the Facebook social networking service. This tag is NOT for support questions about using the Facebook website or the official Face…