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).
Internet Explorer. With fewer add-ons and extensions than other web browsers have, Internet Explorer is naturally a very fast browser. Speed tests show that it's one of the fastest browsers on the market, but its HTML5 loading speed is very slow.