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Apache Portable Runtime
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<ul> <li>Free and open-source software portal</li></ul> <p>The Apache Portable Runtime (APR) is a supporting library for the <a href="/facts/Apache_HTTP_Server/tcmWYYUq">Apache</a> <a href="/facts/Web_server/A4GS6thA">web server</a>. It provides a set of <a href="/facts/API/GMlN4vUr">APIs</a> that map to the underlying operating system (OS). Where the OS does not support a particular function, APR will provide an emulation. Thus programmers can use the APR to make a program truly portable across platforms. </p><p>APR originally formed a part of <a href="/facts/Apache_HTTP_Server/tcmWYYUq">Apache HTTP Server</a>, but the <a href="/facts/Apache_Software_Foundation/Xl9Tt9lE">Apache Software Foundation</a> spun it off into a separate project. Other applications can use it to achieve platform independence. </p>