OAuth Apps: "read:org"

I just noticed I granted “OAuth application (Gitter Public Repo Access) with read:org, user:email scope(s)” before.

And I am wondering what “read:org” is. Github says: " Read-only access to organization membership, organization projects, and team membership.". I still have two questions:

Does “read:org” include source code of my “organization projects”?
Does “read:org” include source code of my “private repo”?

Thanks for your help.

Anyone can help me?
Thanks for your help.