This document outlines the chronological evolution of HTML tags and CSS features from the web's inception in 1991 to 2024. It tracks the introduction, purpose, and eventual fate of various elements, illustrating HTML's growth from a basic set of 18 tags to over 140 elements, alongside CSS's development from simple style rules to robust layout systems. The overview highlights foundational tags that have endured, such as and <a>, as well as obsolete or deprecated features like <blink> and <font>, which were replaced by more semantic alternatives or CSS. It also covers the emergence of interactive and semantic elements in HTML5, including multimedia tags, new form inputs, and graphical capabilities, reflecting the web's transformation from static documents to a rich application platform.</p>