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ReactiveX
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<p>ReactiveX (Rx, also known as Reactive Extensions) is a software library originally created by <a href="/facts/Microsoft/nGIDDXdx">Microsoft</a> that allows <a href="/facts/Imperative_programming/6b5dUnE1">imperative programming</a> languages to operate on sequences of data regardless of whether the data is <a href="/facts/Synchronous/L39sYwbr">synchronous</a> or <a href="/facts/Asynchronous_programming/1cwyNFMu">asynchronous</a>. It provides a set of sequence operators that operate on each item in the sequence. It is an implementation of <a href="/facts/Reactive_programming/Jj8CsdKY">reactive programming</a> and provides a blueprint for the tools to be implemented in multiple <a href="/facts/Programming_languages/cWTYbgWa">programming languages</a>. </p>