I was shocked to see "text messaging" and "smartphone" as words introduced in the 80's. I would have thought those were 90's words at least (for "smartphone" i would have guessed the 00's in fact.)
It looks like some of them are only the way the word was used in that particular part of speech. For example, orbit is listed as 1946 as a verb - but the word was used for much longer as a noun.
Wouldn't a table have been a much better way of presenting this information? Also the user interface is a horrible timeline that gives no feedback while you mouse-over.