I was sort of attempting to string together related milestones (transportation). It would be better to compare card catalogs to wikipedia (and the printing pres

I was sort of attempting to string together related milestones (transportation). It would be better to compare card catalogs to wikipedia (and the printing press before). Or video communications (FaceTime/Skype) with the telegraph and telephone. The development of telephone goes back as far as the bike/car so I'd posit that communications technology grew at about the same pace.