You are looking at the HTML representation of the XML format.
HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the XML format, set format=xml.
See the complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query-continue>
    <allfileusages gafcontinue="Http://bprc.osu.edu/education/rr/webex/Images_WebEx/TAMMap.jpg|1085" />
  </query-continue>
  <query>
    <pages>
      <page pageid="159" ns="0" title="MS technology vocabulary mouse" />
      <page pageid="195" ns="0" title="MS Technology Vocabulary Scanner" />
      <page pageid="197" ns="0" title="MS Technology Vocabulary Gigabyte" />
      <page pageid="202" ns="0" title="MS Technology Vocabulary YouTube" />
      <page pageid="330" ns="0" title="History of Computers - Internet Explorer" />
      <page pageid="682" ns="0" title="Earth Science 7-Detroit, Michigan" />
      <page pageid="786" ns="0" title="Earth Science 7-Mazatlan, Mexico" />
      <page pageid="881" ns="0" title="History of Computers - Touchscreen" />
      <page pageid="1350" ns="2" title="User:Eboehme" />
      <page pageid="1399" ns="0" title="Monotheism" />
    </pages>
  </query>
</api>