It's easy to forget how recent many of these technologies are.
http://allday.com/post/2507-the-10-first-messages-that-changed-the-world
Computer science is not about machines, in the same way that astronomy is not about telescopes. There is an essential unity of mathematics and computer science -- Mike Fellows (often attributed to Dijkstra, but first published by Fellows in 1991 in "Computer SCIENCE and Mathematics in the Elementary Schools")
It's easy to forget how recent many of these technologies are.
http://allday.com/post/2507-the-10-first-messages-that-changed-the-world