…is Cascading Style Sheets. It describes how HTML elements are to be displayed on screen, paper, or in other media – by styling codes
… is Hypertext Markup Language. A standardized system for tagging text files to store font, colour, graphic, and hyperlink effects on Web pages.
JAVA SCRIPT (JS)
…is a programming language. A core technology use on the Web, alongside HTML and CSS and other stored library data.