What is the difference between Angular and Angular JS and which version should I use?

What is the difference between Angular and Angular JS?

I think I know the answer to this question. I think with the later versions, they just simply dropped the "JS". This is because this website, https://angularjs.org/ has "JS" in its name and the linked gethub to this website shows 1.x versions to download and the 2.x versions are denoted as being "alpha" and "beta" here: https://code.angularjs.org/

On the other hand, this website, https://angular.io/, does not have "JS" in its name and if you click around this website for linked content, you will find https://github.com/angular/angular which I believe is version 4.0. You will also find a "quick start" option which leads to https://github.com/angular/quickstart which, according to the description, is version 2.0

I downloaded version 2.0 from angular.io and I downloaded 4.0 and compared them. There is no any compatibility apart from 8 filenames

I found a few other clues that make me think that both 2.0 and 4.0 are ready to use. The page, http://angularjs.blogspot.com/2017/03/angular-400-now-available.html has only one known issue listed but, what is more important than that is the fact that the official release dates for 2.0 and 4.0 list dates that have already come and past https://github.com/angular/angular/blob/master/docs/RELEASE_SCHEDULE.md lists 2017-03-22 4.0.0 + 2.4.12 - Major Version Release. That ship has sailed and there are no entries or updates to this file.

There is more, this web page, http://angularfirst.com/which-angular-version-should-you-learn/, debates which version a new user should learn since 1.x and 2.x are not compatible. It concludes that you should start with 1.3 and monitor the progress of 2.x. But the date of this article makes this advice questionable and talks about events and announcements from 2015.

What do you think?

via xarzu