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Stack Exchange Glossary - Dictionary of Commonly-Used Terms

What are people referring to when they talk about the Stack Overflow "trilogy"? Sometimes they refer to it as the Stack Exchange trilogy...

  • This was closed, but I think it is more useful than having to scroll down to the bottom of the glossary page to get the answer one is looking for... especially in, for example, Google search results
    – Baumr
    Commented Nov 29, 2012 at 20:42

1 Answer 1


I had this question myself:

As detailed on the official blog, the Stack Overflow trilogy includes the first three projects:

  1. StackOverflow.com for programmers
  2. ServerFault.com for sys admins and support specialists
  3. SuperUser.com for computer enthusiasts and power usrs

Their successes spawned the implementation of the StackExchange.com network with the multitude of Q&A websites you see today.

  • 4
    Trilogy is also mentioned in the Stack Exchange Glossary.
    – user102937
    Commented Nov 28, 2012 at 16:28
  • @RobertHarvey, thanks - good suggestion.
    – Baumr
    Commented Nov 29, 2012 at 20:41
  • Better to say the success of SO spawned the network. ServerFault is about 1.5% of the size and 1% of the activity of SO. Most of that is just spillover from SO.
    – Hack-R
    Commented Jul 13, 2016 at 23:31

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