Tim Berners-Lee published a document called HTML Tags

1991 October 29th

The internet pioneer, Tim Berners-Lee, published a document entitled HTML Tags. The document contained a description of the first 18 HTML tags: <title>, <nextid>, <a>, <isindex>, <plaintext>, <listing>, <p>, <h1><h6>, <address>, <hp1>, <hp2>…, <dl>, <dt>, <dd>, <ul>, <li>,<menu> and <dir>. The design of the first version of HTML language was influenced by the SGML universal markup language.