The content inside a cell is left aligned by default, but you can also center or right align the text as well by using the align attributes.
<table width="300" border="2">
<tr><td width="210" align="center" >A</td> <td width="45">B</td> <td width="45">C</td></tr>
<tr><td width="210" align="center" >A</td> <td width="45">B</td> <td width="45">C</td></tr>
</table>
| A | B | C |
| A | B | C |
See how the first column is aligned to the center? You can also right align the columns by using the align="right" inside the <td> cells.
Lesson # 19 : HTML Tutorial - Vertically Aligning the Content Inside the Table Cells