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.

Questions about Android devices are off-topic for Super User and should be asked on android.stackexchange.com unless they specifically involve interaction with a computer. Questions about Android app …
File Synchronization refers to reflecting changes from a set of files to the same set of files in another location. Synchronization can also be applied to contacts, music, or other data.
1962 questions
PHP is a widely-used general-purpose scripting language that is especially suited for Web development. Questions about programming in PHP are off-topic and should be asked on Stack Overflow.
1929 questions
A short range wireless protocol used by various devices, such as cell phones, wireless headsets, mice and keyboards.
Also known as regular expression or regexp, a description of a set of strings, often used for searching and validating strings.
Hardware failure refers to the act of a piece of physical hardware failing to meet its designed standards during operation.
MySQL is an Open Source database now owned by Oracle. The MySQL documentation is expansive and incredibly useful.
A general term used when a computer or device becomes unresponsive to any kind of user input. May be caused by hardware or software reasons.
Free email client from the Thunderbird community. Specify your version number when asking.
OpenVPN is a free and open source software SSL VPN solution. It allows secure point-to-point or site-to-site connections with routed or bridged configurations and remote access facilities.
PuTTY is a free and open source terminal emulator application which can act as a client for the SSH, Telnet, rlogin, and raw TCP computing protocols and as a serial console client. The name "PuTTY" ha…
The Unified Extensible Firmware Interface BIOS (UEFI) is a specification that defines a software interface between an operating system and platform firmware. UEFI replaces the Basic Input/Output Syste…
Iptables is a module that provides the Linux operating system functions of firewall, NAT and logging of data traveling over a computer network.
Blue Screen of Death; a Windows fatal system error, e.g. "A problem has been detected and Windows has been shut down" or "Your PC ran into a problem". Mention the specific error code and all informati…
1737 questions
The number of pixels in a given display or image, representing the smallest physical unit of display. One individual pixel represents a single colour value, and when combined, create a displayed imag…
LAN, short for Local Area Network, is a network that connects multiple devices in a limited geographical area, such as a room, an apartment or a building. Currently, most LANs are based on Wi-Fi, link…
Arch Linux is a rolling-release Linux distribution.
cygwin provides a Unix/Linux-like environment under Microsoft Windows OSes.
1720 questions
Generally used to share a resource over a network, including files and folders as well as printers or other physical devices
1718 questions
Internet Explorer is the web browser developed by Microsoft. Version specific questions should use a version-specific tag, as this tag is for more general cases.
Batteries are the embedded power-source of a component such as a notebook. It is composed of cells of chemical elements that store energy.
SSL refers to Secure Sockets Layer, a security protocol that has been replaced by Transport Layer Security (TLS). TLS is still commonly referred to as SSL.
VMware software provides a completely virtualized set of hardware to the guest operating system.
Processor specifically designed to perform fast memory manipulation, with instructions specifically tailored to handle computer graphics processing and rendering
A crash (or system crash) is a condition where soft- or hardware ceases to function properly.
DO NOT USE THIS TAG! It has been retired. If you have a question about a disk image (a file that represents the contents and structure of a data disk), use [disk-image] or [iso-image] instead. If you …
For questions regarding usage of the Emacs text editor. See also the Emacs Stack Exchange: https://emacs.stackexchange.com
1654 questions
A macro in computer science is a rule or pattern that specifies how a certain input sequence should be mapped to a certain output sequence according to defined rules and procedures. Consider using [vb…
Use for questions referring specifically to versions of OS X 10.6, Snow Leopard. Non-version-specific questions related to OS X should be tagged with [osx]. Questions about Mac hardware should be tagg…
1639 questions
Sleep mode is a low-power state designed to provide very fast resuming of a computer's operation, with minimal power consumption.
Docker - An open platform for distributed applications for developers and sysadmins.
Usually a personal account on a computer system that allows access to a system's (advanced) functions.
Downloading is the process of receiving digital data from another computer, either over a local-area-network or a wide-area-network (i.e. the internet).
The 2013 version of Microsoft's spreadsheet application.
1602 questions
Network-attached storage (NAS) is file-level computer data storage connected to a computer network providing data access to heterogeneous clients.
Ultra low-cost computer the size of a credit card. Also check the Raspberry Pi SE: http://raspberrypi.stackexchange.com/