Drupal has the ability to make pages public or private. In our current installation of Drupal, a non-public page MUST belong to a private category defined by Organic Groups. Organic Groups (aka OG) allows features as explained in You do not have access to view this node.

For a page to be made non-public, you need to

1. Edit a page :-)
2. Un-check the Public checkbox
3. Be sure you have subscribed to one or more OG - you know if you have done this IF you have an Audience: menu below the Public checkbox
4. Check one of the Audience topics (they are all OG)
5. Click submit

A page in an OG appears with a right hand side menu or a different template. This is the sure way to recognize you have done the move properly.

THe good question is: how do you know the Drupal OG?
On the left hand-side menu, select the line named "Groups". This will list all available Organic Groups. In case of the Software and Computing, and for illustration, a right hand-side menu would show either an action menu or a Subscribe button. The Software and Computing OG allows automatic subscription but this MAY NOT be a general feature (OG owner may require approval).