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Section 1: What is HTML?

HTML (HyperText Markup Language) is the standard markup language for documents designed to be displayed in a web browser.

It can be assisted by technologies such as Cascading Style Sheets (CSS) and scripting languages such as JavaScript.

Section 2: What is CSS?

CSS (Cascading Style Sheets) is a style sheet language used for describing the presentation of a document written in a markup language like HTML.

CSS is a cornerstone technology of the World Wide Web, alongside HTML and JavaScript.

Section 3: What is JavaScript?

JavaScript, often abbreviated to JS, is a programming language that conforms to the ECMAScript specification.

JavaScript is high-level, often just-in-time compiled, and multi-paradigm. It has curly-bracket syntax, dynamic typing, prototype-based object-orientation, and first-class functions.