Sinoatrial node. The sinoatrial node (SAN; also known as sinus node) is a group of cells located in the wall of the right atrium of the heart.
How Do Web Browsers Work? The World Wide Web is a system of Internet servers that support specially formatted documents. Web browsers are used to make it easy to access the World Wide Web. Browsers are able to display Web pages largely in part to an underlying Web protocol called HyperText Transfer Protocol (HTTP).
Browsers for Windows. Web browsers aren't all the same: They differ in speed, features, customization, privacy and security options,... Web browsers aren't all the same: They differ in speed, features, customization, privacy and security options, and whether you can bolt on extensions or add-ons for extra control over your Internet experience. Get our tips on Chrome, Firefox, Safari, Edge, and more, whether you're browsing on your laptop or your phone.