To quote Wikipedia (
https://en.wikipedia.org/wiki/Windows_10_editions):
>
Windows 10 Enterprise Long Term Servicing Branch (LTSB) is similar to Windows 10 Enterprise but does not include Cortana, Windows Store, the Edge browser, Photo Viewer and the UWP version of Calculator (replaced by classic version), and will not receive any feature updates, gives companies more control over the update process. Windows 10 Enterprise N LTSB also lacks the same components absent in other N variants (see below), and it is the most stripped down edition of Windows 10 available.
Given that this is Enterprise stuff, you won't get it preinstalled on retail laptops/PCs and buying it separately is impossible - you only get it with a Volume License contract or a MSDN subscription (IIRC 1.1k $ per year).
The "-N" suffix is there since (IIRC) Win XP, it is a version of Windows without bundled Media Player and other stuff.
Edit: According to https://www.howtogeek.com/273824/windows-10-without-the-cruf... one could get Win 10 Enterprise as a $7/month subscription and via this also Win 10 Enterprise LTSB? Does anyone have more details on how and if this works? I'd GLADLY pay $7/month for this, even more.