Binary search, or perhaps rather the bisection method, is one of those algorithms taught at the IT university which one might think is limited only to IT, but then he quickly realizes that it makes life easier outside the computer world. It's especially helpful when your grandmother asks you to hang her window curtains.
Kind of a poor attempt of a joke from my side, but those who did this activity (hanging curtains with millions of rusty clothespins) will know what I'm talking about.