OpenStack is an open cloud computing platform founded by Rackspace and backed by NASA, see openstack.org. It's to counter the proprietary cloud offerings of Amazon's AWS and Microsoft's Azure. Ok, so maybe this doesn't exactly go under the 'operating systems' menu item, but it's pretty close.  From their meetup page:

This is the Atlanta OpenStack developer Meetup. We are a group of free software developers who are passionate about working together to help make the Openstack project a success!

Can't wait for the next meetup? Join us on IRC! We hang out on Freenode at #openstack-atlanta. See the Atlanta OpenStack Meetup page.

Upcoming OpenStack Meetups

Events - Atlanta OpenStack Meetup Group

Events - Atlanta OpenStack Meetup Group
  • Atlanta OpenStack Meetup Group

    Stay tuned for updates closer to the event's date!

    Atlanta, GA 30307 - USA

    Thursday, November 20 at 7:00 PM

    Attending: 3

    Details: http://www.meetup.com/openstack-atlanta/events/213964102/

  • Atlanta OpenStack Meetup Group

    Stay tuned for updates closer to the event's date!

    Atlanta, GA 30322 - USA

    Thursday, December 18 at 7:00 PM

    Details: http://www.meetup.com/openstack-atlanta/events/qlgkffysqbxb/

  • Atlanta OpenStack Meetup Group

    Stay tuned for updates closer to the event's date!

    Atlanta, GA 30322 - USA

    Thursday, January 15 at 7:00 PM

    Details: http://www.meetup.com/openstack-atlanta/events/qlgkffytcbtb/