The Internet Archive discovers and captures web pages through many different web crawls.
At any given time several distinct crawls are running, some for months, and some every day or longer.
View the web archive through the Wayback Machine.
Bootstrap.NET is a strongly typed version of Bootstrap implemented in Razor Components, with a nice Bootstrap-like syntax for specifying options on components. On top of that, you get compile-time errors if you try to assign invalid options to components.
While Bootstrap's Collapse component (accordions) can be very useful and works well in mobile websites, tab-based navigation usually works better in desktop screens. This component provides a way to integrate both tabs and accordions using some extra CSS and Javascript.