This document describes various HTML tags including <B>, <I>, <U>, <CENTER>, and <FONT>. The <B> tag makes text bold, <I> makes it italicized, and <U> underlines it. <CENTER> centers text. The <FONT> tag controls text color, size, and style using attributes like color, face, and size. The document provides examples of how to use these tags and attributes. It also explains how to save an HTML file and open it in a web browser.