Internet Explorer is a series of graphical web browsers developed by Microsoft and included as part of the Microsoft Windows line of operating systems. A Web browser that made its debut in 1995 as Microsoft's response to Netscape, one of the first graphical-based Web browsers and, at the time, the dominant browser in use with control of over 90 percent of the market.
Microsoft Edge, initially developed under the codename Project Spartan, is a web browser developed by Microsoft and included in the company's Windows operating system. Officially released on July 29, 2015, it replaced Internet Explorer as the default browser on Windows 10. It is also the default browser in Windows 10 for smart phones and small tablets. Unlike other browsers, Edge is exclusive to Windows 10 and cannot be used on previous Windows versions.
Microsoft Edge is designed to be a lightweight web browser with a layout engine built around web standards, removing support for legacy technologies such as ActiveX in favour of extensions and integration with other Microsoft services, such as the digital assistant Cortana and OneDrive; it also includes annotation tools and a reading mode.