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3.1. Predefined Variables</A></TD></TR>
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<TD class=v2 vAlign=top colSpan=15><A class=v2
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3.2. Predefined Global Constants</A></TD></TR>
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3.3. Built-in Functions</A></TD></TR>
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3.4. Built-in Library</A></TD></TR>
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<TD class=v2 width=14 height=18><IMG height=1
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4. Standard Library Reference</A></TD></TR>
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4.1. Standard Library</A></TD></TR>
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5. Ruby Tools</A></TD></TR>
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5.1. Standard Tools</A></TD></TR>
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5.2. Additional Tools</A></TD></TR>
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5.3. Ruby Application Archive</A></TD></TR>
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<TD class=v2 width=14 height=18><IMG height=1
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6. Ruby Updates</A></TD></TR>
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6.1. Summary of Changes</A></TD></TR>
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6.2. Changes from 1.6.5 to 1.7.1</A></TD></TR>
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6.3. The Future of Ruby</A></TD></TR>
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6.4. Participate in Ruby</A></TD></TR>
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