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document.write('<b>Start Here</b><br>');
document.write('<a href="index.php" target="_top">1.1 Introduction</a><br>');
document.write('<a href="definitions.php" target="_top">1.2 Essential definitions</a><br><br>');
document.write('<b>Operating System Concepts</b><br>');
document.write('<a href="concepts-intro.htm" target="_top">2.1 Introduction</a><br>');
document.write('<a href="concepts-processes.htm" target="_top">2.2 Processes</a><br>');
document.write('<a href="concepts-scheduling.htm" target="_top">2.3 Scheduling</a><br>');
document.write('<a href="concepts-dma.htm" target="_top">2.4 Direct Memory Access</a><br>');
document.write('<a href="concepts-mm.htm" target="_top">2.5 Memory Management</a><br>');

document.write('|_<a href="concepts-mm-basic.htm" target="_top">2.5.1 Basic</a><br>');
document.write('|_<a href="concepts-mm-swapping.htm" target="_top">2.5.2 Swapping</a><br>');
document.write('|_<a href="concepts-mm-vm.htm" target="_top">2.5.3 Virtual Memory</a><br>');

document.write('2.6 Files<br><br>');
document.write('<b>InterProcess Communication</b><br>');
document.write('<a href="ipc_whatisit.htm" target="_top">3.1 What is it?</a><br>');
document.write('<a href="mutex_rules.htm" target="_top">3.2 Four rules of IPC</a><br>');
document.write('<a href="solutions.htm" target="_top">3.3 Software solutions</a><br>');

document.write('<br><i><a href="busywait.htm" target="_top">Busy waiting solutions</a></i><br>');
document.write('|_<a href="busywait-sharedtoken.htm" target="_top">3.3.1 Shared Token</a><br>');
document.write('|_<a href="busywait-sharedflag.htm" target="_top">3.3.2 Shared Flag/Lock</a><br>');
document.write('|_<a href="busywait-2flags-a.htm" target="_top">3.3.3 Pair of Flags (a)</a><br>');
document.write('|_<a href="busywait-2flags-b.htm" target="_top">3.3.4 Pair of Flags (b)</a><br>');
document.write('|_<a href="busywait-dekkers.htm" target="_top">3.3.5 Dekker\'s Algorithm</a><br>');
document.write('|_<a href="busywait-petersons.htm" target="_top">3.3.6 Peterson\'s Algorithm</a><br>');
document.write('<i><a href="blocking.htm" target="_top">Blocking solutions</a></i><br>');
document.write('|_<a href="blocking-sleepandwakeup.htm" target="_top">3.3.7 Sleep and Wakeup</a><br>');
document.write('|_<a href="blocking-semaphores.htm" target="_top">3.3.8 Semaphores</a><br><br>');

document.write('<b>Flash Animations</b><br>');
document.write('<a href="flashes/busywait-swf.htm" target="_top">+Busy Waiting</a><br>');
document.write('<a href="flashes/sharedtoken-swf.htm" target="_top">+Shared Token</a><br>');
document.write('<a href="flashes/producerconsumer-swf.htm" target="_top">+Producer-Consumer Problem</a><br>');
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