OpenResty (aka. ngx_openresty) is a full-fledged web application server by bundling the standard Nginx core, lots of 3rd-party Nginx modules, as well as most of their external dependencies.

Google Apps and reseller administrators can use the Directory API to manage Mobile and Chrome OS devices, groups, group aliases, members, organization units, users, and user aliases.

Knockout.js is an open source JavaScript library for dynamic HTML UIs using the Model-View-View Model (MVVM) pattern. Version 3.0 was released on October 25th, 2013.

Rascal is an experimental domain specific language for metaprogramming, such as static code analysis, program transformation and implementation of domain specific languages. It includes primitives from relational calculus and term rewriting. Its syntax and semantics are based on procedural (imperative) and functional programming.

Ember.Router is a built-in routing mechanism within Ember.js which represents application state with a URL. It gives you helpful tools for managing application state in a way that scales with your application.

PyCUDA is the Python module which provides a comprehensive pythonic interface to the NVIDIA CUDA GPU computing environment.

(Apple) Wallet tag is applicable for questions relating to Apple Wallet (formally Passbook), Apple Pay, and Apple's PassKit framework. Wallet makes use of APNS to trigger push updates to pass content.

Precision and Recall are statistical measures of performance for information retrieval algorithms based on binary classification. Precision is a measure of the percent of all classifications (items retrieved) that are relevant. Recall is a measure of the percent of relevant classifications (items retrieved) successfully found by the algorithm, relative to all relevant items that exist and could have been found.

Questions about SAP GUI, SAP GUI Scripting, using SAP GUI (Calling transactions, setting up in the environment, customizing, etc.)

OAuth is an open authorization framework, which can be used to authenticate a user against an OAuth provider on third party websites without exposing the credentials to the third party