The sixteenth release of Apple's desktop and server operating system for Macintosh computers. Use this tag only if your question relates to using macOS Catalina APIs or macOS Catalina specific behavior. Questions relating to using or troubleshooting macOS are off-topic.

The 5th version of the reactive extensions for javascript.

database-backups are intended to preserve data by serializing database tables to a text format or exporting them to a binary format

Schema.org is a collaboration from several search engines, defining logic data model and vocabulary for structured data based on entity relationships model. It has proposed in the model the set of entities, their object and data properties.

In Ruby on Rails, a has_many :through association is often used to set up a many-to-many connection with another model. This association indicates that the declaring model can be matched with zero or more instances of another model by proceeding through a third model.

HLSL(High Level Shader Language) is a proprietary shading language developed by Microsoft for use with the Microsoft Direct3D API

DO NOT USE — this tag is being cleaned up. Use [android-contentprovider], [flutter-provider], [provider-model], or whatever more specific tag is appropriate instead.

This tag is used for questions regarding the Visual Component Library used in Borland/CodeGear/Embarcadero Delphi and C++Builder products. Do not confuse this with the Varnish Configuration Language (VCL). Use the "varnish-vcl" tag for questions related to that product.

NAudio is an open source audio library for .NET, supporting audio playback, recording and sample manipulation as well as reading and writing various audio file formats.

BLoC stands for Business Logic Component. The application implementation pattern of using BLoC is called BLoC pattern.

A cycle is a process or series of items, which repeats several times.