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  understand them completely. In addition, a microkernel based operating
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  understand them completely. In addition, a microkernel based operating
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  system reaches completion sooner than monolithic kernels as the system can
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  system reaches completion sooner than monolithic kernels as the system can
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  be used even without some traditional subsystems (e.g. block devices,
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  be used even without some traditional subsystems (e.g. block devices,
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  filesystems and networking).</para>
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  filesystems and networking).</para>
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  <para><mediaobject id="arch1" xreflabel="">
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  <figure><mediaobject id="arch1" xreflabel="">
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      <imageobject role="html">
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      <imageobject role="html">
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        <imagedata fileref="images/arch1.png" format="PNG" />
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        <imagedata fileref="images/arch1.png" format="PNG" />
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      </imageobject>
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      </imageobject>
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      <imageobject role="fop">
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      <imageobject role="fop">
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        <imagedata fileref="images.vector/arch1.svg" format="SVG" />
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        <imagedata fileref="images.vector/arch1.svg" format="SVG" />
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      </imageobject>
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      </imageobject>  
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    </mediaobject>
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      <caption>HelenOS architecture overview</caption>
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    <title>HelenOS architecture overview.</title>
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    </mediaobject></para>
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    </figure>
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  <para>HelenOS is comprised of the kernel and userspace server tasks. The
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  <para>HelenOS is comprised of the kernel and userspace server tasks. The
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  kernel provides scheduling, memory management and IPC. It also contains
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  kernel provides scheduling, memory management and IPC. It also contains
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  essential device drivers that control the system clock and other devices
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  essential device drivers that control the system clock and other devices
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  necessary to guarantee a safe environment. Userspace communicates with the
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  necessary to guarantee a safe environment. Userspace communicates with the