Internet Explorer, also known as IE, is one of the oldest web browsers that has been in use since the 1990s. It was the default browser for Windows operating systems until Microsoft replaced it with Microsoft Edge in 2015. Internet Explorer has a few synonyms, which include Microsoft Internet Explorer, IE, Windows Internet Explorer, and simply Internet Explorer. Some people may also refer to it as Explorer or MSIE. Regardless of its various names, Internet Explorer was an essential tool in the early days of the internet, and it played a crucial role in shaping the internet into what it is today.