Just a heads up, clicking the OSI logo takes you to a page that no longer exists.
Is this the page it should go to?
I bookmarked that, intending to have a quick reference to refer to when someone has a question about OSS. It seems a good resource as any, and it's the perfect authority as it's who certifies each app page, presumably, I guess. I mean the logo is saying "we accept the definition at this page" and the page it goes to no longer exists. So it sends a mixed message, the most clear one being that the definition isn't kept current.
For the record, this is the link that the OSI logo is associated with, so you can click it for yourself and see where it goes.