Even using stuff as common place as messaging and instant chat is a form of black magic.
I punch a series of characters on my phone screen, push another button and it instantly sends the information to someone maybe 10000 miles away and recreates the same series of characters in the same order on their screen.
It does this by sending the information to my router wirelessly, that sends it down a copper wire along with probably dozens of other signals all at the same time, it goes........well, somewhere. The signal, my signal that is, is transmitted up into space to a satellite along with maybe millions of other signals, probably bounced to another satellite or two which just happen to be in the right place and from there it goes back to earth, is pushed back into a wire or fibre optic cable finds it way to my mates router and arrives via the airwaves right at his screen and the characters magically appear.
The question is for me when its bowling along with a few million similar messages.......how does it know where to go? Why doesn't it get mixed up?
It all happens in an instant yet we just 'do it'. I swear it's a black art.