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navsection: start 
title: Welcome to Arvados!
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This guide provides an introduction to using Arvados to solve big data bioinformatics problems.


h2. Typographic conventions

This manual uses the following typographic conventions:

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<li>Code blocks which are set aside from the text indicate user input to the system.  Commands that should be entered into a Unix shell are indicated by the directory where you should  enter the command ('~' indicates your home directory) followed by '$', followed by the highlighted <span class="userinput">command to enter</span> (do not enter the '$'), and possibly followed by example command output in black.  For example, the following block indicates that you should type <code>ls foo.*</code> while in your home directory and the expected output will be "foo.input" and "foo.output".
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        <li><img class="hascaption" src="{{ site.baseurl }}/images/keyfeatures/chooseinputs.png" style="width:909px; height:503px;" title="...by changing parameters or picking new datasets..."></li>
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