Internet Information Services (IIS) is an extensible web server software created by Microsoft for use with the Windows NT family.
ASP.NET is an open-source, server-side web-application framework designed for web development to produce dynamic web pages.
Microsoft HTTPAPI is a kernel-mode HTTP driver in the Windows operating system responsible for handling HTTP requests and responses with efficiency, scalability, and security.
Outlook on the web is an information manager web app. It includes a web-based email client, a calendar tool, a contact manager, and a task manager.