The last version of Internet Explorer, version 11, was released on October 17, 2013. This is a very long time ago when taking into account the rapid development of web technologies. These days it is often difficult and time consuming to get modern technologies to work well in this old browser. More and more frameworks are dropping support, and even Microsoft themselves has announced that they will fully drop support for IE in their own services in 2021.
Consequently, we have decided to not include support for IE in the Design Library website.
Definitions and explanations of units and measurements we use.
If you set your root size to 16, you can easily use .5rem increments to build your layouts.
EM is a unit for typography.
Want to know more? Here is an article about REM vs EM
Dpi = Dots per inches, usually used when discussing screen sizes and resolutions