</para>
</listitem>
</varlistentry>
<varlistentry>
<term><acronym>RDBMS</acronym></term>
<listitem>
<para>
<ulink
url="https://en.wikipedia.org/wiki/Relational_database#RDBMS">Relational
Database Management System</ulink>
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><acronym>RFC</acronym></term>
<listitem>
<para>
<ulink
url="https://en.wikipedia.org/wiki/Request_for_Comments">Request For
Comments</ulink>
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><acronym>SGML</acronym></term>
<listitem>
<para>
<ulink url="https://en.wikipedia.org/wiki/Standard_Generalized_Markup_Language">Standard Generalized
Markup Language</ulink>
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><acronym>SNI</acronym></term>
<listitem>
<para>
<ulink
url="https://en.wikipedia.org/wiki/Server_Name_Indication">
Server Name Indication</ulink>,
<ulink url="https://datatracker.ietf.org/doc/html/rfc6066#section-3">RFC 6066</ulink>
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><acronym>SPI</acronym></term>
<listitem>
<para>
<link linkend="spi">Server Programming Interface</link>
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><acronym>SP-GiST</acronym></term>
<listitem>
<para>
<link linkend="spgist">Space-Partitioned Generalized Search Tree</link>
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><acronym>SQL</acronym></term>
<listitem>
<para>
<ulink url="https://en.wikipedia.org/wiki/SQL">Structured Query Language</ulink>
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><acronym>SRF</acronym></term>
<listitem>
<para>
<link linkend="xfunc-c-return-set">Set-Returning Function</link>
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><acronym>SSH</acronym></term>
<listitem>
<para>
<ulink url="https://en.wikipedia.org/wiki/Secure_Shell">Secure
Shell</ulink>
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><acronym>SSL</acronym></term>
<listitem>
<para>
<ulink url="https://en.wikipedia.org/wiki/Transport_Layer_Security#SSL_1.0,_2.0,_and_3.0">Secure Sockets Layer</ulink>
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><acronym>SSPI</acronym></term>
<listitem>
<para>
<ulink url="https://msdn.microsoft.com/en-us/library/aa380493%28VS.85%29.aspx">Security
Support Provider Interface</ulink>
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><acronym>SYSV</acronym></term>
<listitem>
<para>
<ulink url="https://en.wikipedia.org/wiki/UNIX_System_V">Unix System V</ulink>
</para>
</listitem>
</varlistentry>
<varlistentry>