My First Table

First Heading	Second Heading
First Row One	Second Row One
First Row Two	Second Row Two

summary attribute

Provides a summary of the table's purpose and structure for use by browsers that render to non-visual media.

table and column width

As not specified, this is determined by the content of table cells

Necessary to determine the number of columns and their width

My First Table

First Heading Longer	Second Very Much Longer Heading that the Browser Displays
First Row One	Second Row One
First Row Two	Second Row Two