\relax 
\@writefile{toc}{\contentsline {section}{\numberline {1}Introduction}{1}}
\@writefile{toc}{\contentsline {section}{\numberline {2}Several On-line Systems}{1}}
\@writefile{toc}{\contentsline {subsection}{\numberline {2.1}}{1}}
\@writefile{toc}{\contentsline {subsection}{\numberline {2.2}}{1}}
\@writefile{toc}{\contentsline {subsection}{\numberline {2.3}}{1}}
\@writefile{toc}{\contentsline {subsection}{\numberline {2.4}}{1}}
\@writefile{toc}{\contentsline {section}{\numberline {3}Several Off-line Systems}{1}}
\@writefile{toc}{\contentsline {subsection}{\numberline {3.1}}{1}}
\@writefile{toc}{\contentsline {subsection}{\numberline {3.2}}{2}}
\@writefile{toc}{\contentsline {subsection}{\numberline {3.3}}{2}}
\@writefile{toc}{\contentsline {section}{\numberline {4}Um, Arguments}{2}}
\@writefile{toc}{\contentsline {section}{\numberline {5}Conclusions}{3}}