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<TITLE>BRLTTY Reference Manual: Standard Braille Dot Numbering Convention</TITLE>
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<H2><A NAME="dots"></A> <A NAME="s13">13.</A> <A HREF="BRLTTY.html#toc13">Standard Braille Dot Numbering Convention</A></H2>
<P>A standard braille cell consists of six dots
arranged in three rows and two columns.
Each dot can be specifically identified by its number as follows:
<DL>
<DT><B>1</B><DD>
<P>Top-left (row 1, column 1).</P>
<DT><B>2</B><DD>
<P>Middle-left (row 2, column 1).</P>
<DT><B>3</B><DD>
<P>Bottom-left (row 3, column 1).</P>
<DT><B>4</B><DD>
<P>Top-right (row 1, column 2).</P>
<DT><B>5</B><DD>
<P>Middle-right (row 2, column 2).</P>
<DT><B>6</B><DD>
<P>Bottom-right (row 3, column 2).</P>
</DL>
</P>
<P>Computer braille has introduced a fourth row at the bottom.
<DL>
<DT><B>7</B><DD>
<P>Below-left (row 4, column 1).</P>
<DT><B>8</B><DD>
<P>Below-right (row 4, column 2).</P>
</DL>
</P>
<P>Perhaps a picture will make this numbering convention easier to understand.
<BLOCKQUOTE><CODE>
<PRE>
1 o o 4
2 o o 5
3 o o 6
7 o o 8
</PRE>
</CODE></BLOCKQUOTE>
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