HTML is not a programming language because it fails to meet several functional criteria. Nevertheless, HTML coding is valuable beyond that pedantic debate.

Run BASIC provides a programmable BASIC interpreter as an online service so that users can create programs and execute them on the Web site.

But underestimating HTML is a mistake. HTML is the most significant computing language, programming or otherwise, ever developed.

The new PyScript project lets you embed Python programs directly in HTML pages and execute them within the browser without any server-based requirements.