In other words, Netscape's vision of tables had more to do with page layout and screen design than spreadsheets and quantification. Since 1995, tables have been the power tool of Web design. It's worth remembering, though, that the way we use tables amounts to a huge technological perversion. Generally speaking, tables suggest a regular and uniform structure. Designers spend much of their time figuring out how to escape that regularity and uniformity by outsmarting the basic rules.
Tables are an excellent case in point.
This is the general container for the table construction as a whole. As indicated above, every table must include at least one instance of each of these containers. Text within a TH container occurs in bold and is horizontally centered by default. Columns are in effect just stacks of individual cells. There's no container to delineate columns.