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I just stumbled over this page in the Stack Exchange dropdown (top left corner).

CS50

cs50 - For students of HarvardX CS50x: Introduction to Computer Science

When I click on it I get the following message:

Warning: this site is currently in private beta for at least a few more days.

To log in, you must have commited to the Area 51 site proposal and received the invitation email. Click the invitation link in the email to log in!

However, the page on Area 51 does not exist, so it's impossible to get any further information.

So, what is going on? Apparently this is a private site for Harvard students?

I don't have a problem with that in general, but I wonder

  • a) Why is it part of the Stack Exchange family if it is a private site?
  • b) Why does it show up for me under Stack Exchange sites at all if it won't even let me have read access to it?

It seems that there are several of those sites, for example edx-cs-169-1x.

Is this some sort of pilot project?

  • There was a question a short while back from a professor looking for a way for his students to learn about Stack Exchange, perhaps a deal was struck somewhere? – Martijn Pieters Apr 7 '14 at 21:03
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    That's because Area 51 doesn't exist, according to the government. ;o) – Johnny Bones Apr 7 '14 at 21:03
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    Seems like the error is in the "Area 51 site proposal" link; it appears to be auto-generated to a non-existent site proposal. – Robert Harvey Apr 7 '14 at 21:05
  • @RobertHarvey I thought of that too, but searching yielded no results either. – magnattic Apr 7 '14 at 21:06
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    That's because there is no CS50 proposal; there is only the beta site, which is not yet public, and therefore not searchable via Google. – Robert Harvey Apr 7 '14 at 21:09
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    @JohnnyBones Actually, the government acknowledged its existence last year :) – ThisSuitIsBlackNot Apr 7 '14 at 21:15
  • https://cs50.stackexchange.com/ is now open for the public! – Peter Mortensen Jul 11 '15 at 14:15
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We're not really ready to announce this quite yet, but you might surmise from the title that this is a site "For Students of HarvardX CS50x: Introduction to Computer Science."

The Area 51 link is just following a template that, in this case, doesn't apply.

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    Does this mean that the private Stack Exchange Enterprise option is no longer internal only and is also available for academic use? Maybe a competitor for Piazza? – Austin Henley Apr 7 '14 at 21:17
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    Uh, exciting! I hope I did not spoil any surprise. You might want to hide it from the top bar until it is ready, though. I usually go through there to find interesting new SE sites, and am probably not the only one. – magnattic Apr 7 '14 at 21:28
  • @AustinHenley It honestly doesn't mean anything at this point. – Adam Lear Apr 7 '14 at 21:28
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    @AnnaLear Smells like a cover-up! – Austin Henley Apr 7 '14 at 21:30
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    @AustinHenley BYOTinfoilHat – Adam Lear Apr 7 '14 at 21:32
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    Uh, the beta sites are still vulnerable to the breakin. I managed to create an account on this one (well, the other one) -- if sensitive data is going to be passed around I suggest you find a way to prevent that. – Manishearth Apr 17 '14 at 13:07
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    @Manishearth: Also, the questions are leaking into the Filtered Questions page. – Ilmari Karonen Apr 17 '14 at 21:03
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    You guys are reading waayy too much into this. Seriously. We're working with a series of online courses offered by top universities to see if a curriculum-specific companion Q&A could (a) help these programs to be more innovative and successful, and (b) provide any useful public artifacts for future audiences. We're not making these sites widely available to the public yet because this is still highly experimental and, frankly, so far the content would be of zero interest to anyone but the participants. – Robert Cartaino Apr 24 '14 at 20:31
  • @RobertCartaino I am very excited by the idea of curriculum-specific companion Q&A sites, it's great that you're looking into this – user241462 Apr 25 '14 at 15:54
  • David and @Robert - any updates, almost year later? Is this still an experiment? Is it successful? – Shadow The Curly Braced Wizard Mar 19 '15 at 12:38
  • @ShadowWizard It's not an ideal fit for our engine, but the administrators have conveyed that they wish to continuing using the sites we have, but we will not likely be creating any more. – Robert Cartaino Mar 19 '15 at 13:55
  • @Robert thanks the update. As it stands now, those two sites are considered "private beta" e.g. they don't appear in the sites list or in SEDE. Any plan to change this? – Shadow The Curly Braced Wizard Mar 19 '15 at 13:56
  • @ShadowWizard There was something about the "private beta" settings that allow them to work better with our network, so we kept it that way. It might have been the reduced reputation levels or that they would not be an entirely visible part of our network listings, but I cannot recall the specifics. – Robert Cartaino Mar 19 '15 at 13:59
  • @Robert yes this makes sense, but what if users here want to run stats on those two sites? Usually that's what we have SEDE for, but they don't appear in there. Is it possible to manually add them or something like that? – Shadow The Curly Braced Wizard Mar 19 '15 at 14:02
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The new beta Stack Exchange site for students of UC BerkeleyX's CS169.1x Engineering Software as a Service course on edX is now active. However, it is still not listed in the sites list on StackExchange.com, and the sidebar still appears to indicate that it's as a private beta, though it's actually publicly accessible.

Students are linked to this site by the "Discussion" tab when they're viewing the course materials, and from the course introduction.

We'll post updates to this "Course Info" page as we go along, however, our primary communication channel will be our interactive forum, where we’ll all contribute to an ongoing discussion of the material.

The site supports edX as a new login provider:

Registration on the site also requires agreement to a modification to the typical privacy policy: information entered on the site may also be shared with edX. (Trivia: When this policy was added during the beta, this meant that the handful of existing accounts had to be deleted for legal reasons.)

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    "interactive forum" Oh bother. – michaelb958 Apr 19 '14 at 13:36
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    I expect them to benefit from Stack Exchange regardless of what they call it. – Jeremy Apr 19 '14 at 15:11
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    Well they certainly seem to be treating it as a forum. Some of the questions are terribile. – user226333 May 8 '14 at 3:55

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