I bet they're just all types of acronyms Nintendo may want to use in the future (probably all/mostly for Gameboys, given the all the "GB"s in there).
One of these could be the name for the DS, after all Nintendo doesn't have to stick to it's "third pillar" plan if it doesn't want to. However, I think Nintendo really believes in the third pillar (even though it seems a bit silly), and I think it will give the DS a brand-new name.