watchOS 2 is the second version of Apple's operating system for Apple Watch and is the successor to watchOS. It was announced at the company's Apple Worldwide Developers Conference (WWDC) on June 8, 2015, and was released on September 21, 2015.

mediaelement is an abstraction used to represent multimedia viewed by a user

An Accessor is (usually) a function that is responsible for reading or writing a property.

User interface testing is the process of testing a product's graphical user interface to ensure it meets its specifications.

A Rich Internet Application (RIA) is a web application that has many of the characteristics of desktop applications. RIA here typically refers to the .NET RIA Services/WCF RIA Services framework.

TeX is a typesetting system, where the output is defined by command-sequences. Note that https://tex.stackexchange.com is specifically dedicated to TeX questions.

A storage API used for binary data storage, eg. Google App Engine blobstore service.

FFTW, "The Fastest Fourier Transform in The West", is a C library which implements discrete Fourier Transforms. It is licensed under the GNU GPL.

DB2 for Linux, UNIX and Windows

The Windows Store is a digital distribution platform for Windows applications. It distributes Universal Windows Platform Applications (AppX packages) and legacy Windows Phone apps (XAP packages) but not legacy desktop applications (such as MSI installers). This tag should not be used for platform questions (APIs, etc.) - use 'uwp' instead.

Dice are small objects thrown by hand that land in different positions, used to generate random value for games, particularly gambling.