Web pages are programmed using a language called HTML (HyperText Markup Language).

Web page designers can make their pages more interactive and dynamic by including small programs written in Java called applets. When Web browsers download the pages, they know how to render the HTML (convert the code into the text and graphics for display on the screen) and run the Java applets.

Web servers are commonly programmed in C, Java, or a language called Perl (practical extraction and reporting language), which was developed in the mid-1980s by Larry Wall, a computer system administrator.

source: "Computer." Britannica School, Encyclopedia Britannica, 18 Feb. 2021. school.eb.com/levels/middle/article/computer/273764#199037.toc. Accessed 18 Aug. 2021.