1. This document provides a summary of 50 HTML tags, describing their purpose, differences between HTML 4.01 and HTML 5, and providing examples of their usage. The tags cover a wide range of common elements for formatting text, images, links, lists, forms, tables and more.
2. Key differences between HTML 4.01 and HTML 5 noted include HTML 5's use of <!DOCTYPE html> instead of document types, removal of deprecated attributes, and addition of new attributes. Some tags like <center> and <font> are not supported in HTML 5, while CSS should be used instead for formatting.
3. The summaries concisely explain each tag's purpose and provide simple examples to illustrate