p50577368">Relational databases</a>
            </span>
          </dt>
          <dt>
            <span class="sect2">
              <a href="intro_terrain.html#idp50621160">Object-oriented databases</a>
            </span>
          </dt>
          <dt>
            <span class="sect2">
              <a href="intro_terrain.html#idp50574144">Network databases</a>
            </span>
          </dt>
          <dt>
            <span class="sect2">
              <a href="intro_terrain.html#idp50647776">Clients