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 is Microsoft's integrated web browser. Known by its acronym IE, the program is referred to as an integrated web browser, rather than as a standard web browser, because of the heavy reliance between it and Microsoft's Windows operating system. IE components are used in Windows' file manager, help browser, integrated email client, and many other programs.