A server is a running instance of a software application capable of accepting requests from a client and giving responses accordingly.

Encoding is a set of predefined rules to reversibly transform a piece of information in a certain representation into a completely different representation. The other way round is called decoding. This tag is rather generic, but it is mainly used for binary encoding schemes such as base 64 and hexadecimal.

A hash function is any well-defined procedure or mathematical function that converts a large amount of data into a small datum, usually a single integer. For questions about hashtags as used to label content on social media, use hashtag. For questions about URLs and HTML anchors, use fragment-identifier. For questions about Ruby's hash type, use ruby-hash.

Collections APIs provide developers with a set of classes and interfaces that make it easier to handle collections of objects.

Merging is a generic term for combining two or more related sets of data. It is commonly associated with revision control systems when reconciling multiple changes made to a revision-controlled collection of files. Merging multiple data sets is another use of this tag.

A general technique that binds two data/information sources together and maintains them in sync.

Visual Studio 2012 is a version of Microsoft's Visual Studio. Do not use this tag unless you have a specific question about Visual Studio -- not just a coding issue.

Redis is an open source (BSD licensed), in-memory data structure store, used as a database, cache and message broker. It supports data structures such as strings, hashes, lists, sets, sorted sets with range queries, bitmaps, hyperloglogs, geospatial indexes with radius queries and streams. It also provides pub-sub capabilities. Use this tag for questions related to Redis and in-memory system.

jQuery Mobile is a touch-optimized web framework for smartphones and tablets. It provides a unified user interface system across all popular mobile device platforms, built on jQuery.

A command line is a string given to a command interpreter that tells it actions to take, such as running programs or copying files. The interpreter processes command lines with escapes and substitutions.

A terminal or command-line interface is a text-only interface for interacting with an operating system or a piece of software. A user typically types commands into the terminal to perform specific tasks.