Someone over at Wikipedia did not like my adding links to the engineering learning wiki in a number of engineering articles. My additions were identified correctly as external links at the end of each engineering article, but were removed.
Hmm ... Given the engineering learning wiki does not promote any company, does not have any advertisements, but does promote the "knowledge should be free" concept, I'm confused. Perhaps since I added a number of links quickly, it was perceived as SPAM. (see the first update to this post) (final update)