<record>
  <controlfield tag="001">59</controlfield>
  <datafield tag="653" ind1="1" ind2=" ">
    <subfield code="a">Linux</subfield>
  </datafield>
  <datafield tag="653" ind1="1" ind2=" ">
    <subfield code="a">expert systems</subfield>
  </datafield>
  <datafield tag="653" ind1="1" ind2=" ">
    <subfield code="a">configuration</subfield>
  </datafield>
  <datafield tag="653" ind1="1" ind2=" ">
    <subfield code="a">etc.</subfield>
  </datafield>
</record>