From a Star Trek coloring book from 1979. There must be some mistake, because there is nothing at all wrong with this picture. Well, except for perhaps being just a bit too awesome.
If you want to get specific about the nerdy ornaments you allow on your tree, Hallmark has you covered with this famous scene from the "Star Trek" episode, "Mirror, Mirror."
It even includes the dialog.
(Shatnerday, Star Trek)
(William Shatner, Deforest Kelley, Star Trek)
(William Shatner, Deforest Kelley, a href="http://scifi.icanhascheezburger.com/category/star-trek/" target="_blank">Star Trek)
(Deforest Kelley, Star Trek)
(Leonard Nimoy, Deforest Kelley, Star Trek)