url="https://en.wikipedia.org/wiki/Internationalization_and_localization">National
      Language Support</ulink>
     </para>
    </listitem>
   </varlistentry>

   <varlistentry>
    <term><acronym>ODBC</acronym></term>
    <listitem>
     <para>
      <ulink
      url="https://en.wikipedia.org/wiki/Open_Database_Connectivity">Open
      Database Connectivity</ulink>
     </para>
    </listitem>
   </varlistentry>

   <varlistentry>
    <term><acronym>OID</acronym></term>
    <listitem>
     <para>
      <link linkend="datatype-oid">Object Identifier</link>
     </para>
    </listitem>
   </varlistentry>

   <varlistentry>
    <term><acronym>OLAP</acronym></term>
    <listitem>
     <para>
      <ulink url="https://en.wikipedia.org/wiki/Online_analytical_processing">Online Analytical
      Processing</ulink>
     </para>
    </listitem>
   </varlistentry>

   <varlistentry>
    <term><acronym>OLTP</acronym></term>
    <listitem>
     <para>
      <ulink url="https://en.wikipedia.org/wiki/Online_transaction_processing">Online Transaction
      Processing</ulink>
     </para>
    </listitem>
   </varlistentry>

   <varlistentry>
    <term><acronym>ORDBMS</acronym></term>
    <listitem>
     <para>
      <ulink url="https://en.wikipedia.org/wiki/Object%E2%80%93relational_database">Object-Relational
      Database Management System</ulink>
     </para>
    </listitem>
   </varlistentry>

   <varlistentry>
    <term><acronym>PAM</acronym></term>
    <listitem>
     <para>
      <ulink
      url="https://en.wikipedia.org/wiki/Pluggable_authentication_module">Pluggable
      Authentication Modules</ulink>
     </para>
    </listitem>
   </varlistentry>

   <varlistentry>
    <term><acronym>PGSQL</acronym></term>
    <listitem>
     <para>
      <link linkend="postgres"><productname>PostgreSQL</productname></link>
     </para>
    </listitem>
   </varlistentry>

   <varlistentry>
    <term><acronym>PGXS</acronym></term>
    <listitem>
     <para>
      <link linkend="extend-pgxs"><productname>PostgreSQL</productname> Extension System</link>
     </para>
    </listitem>
   </varlistentry>

   <varlistentry>
    <term><acronym>PID</acronym></term>
    <listitem>
     <para>
      <ulink url="https://en.wikipedia.org/wiki/Process_identifier">Process Identifier</ulink>
     </para>
    </listitem>
   </varlistentry>

   <varlistentry>
    <term><acronym>PITR</acronym></term>
    <listitem>
     <para>
      <link linkend="continuous-archiving">Point-In-Time
      Recovery</link> (Continuous Archiving)
     </para>
    </listitem>
   </varlistentry>

   <varlistentry>
    <term><acronym>PL</acronym></term>
    <listitem>
     <para>
      <link linkend="server-programming">Procedural Languages (server-side)</link>
     </para>
    </listitem>
   </varlistentry>

   <varlistentry>
    <term><acronym>POSIX</acronym></term>
    <listitem>
     <para>
      <ulink url="https://en.wikipedia.org/wiki/POSIX">Portable Operating
      System Interface</ulink>
     </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">