This is a post in support of the Tau Manifesto, and Tau Day, 6/28. It's silly to memorize an absurd number of digits of pi and then be obliged to double them before they are useful. Calculators need a "tau" τ key. Programming languages need a TAU constant. Where else than in a formula involving pi do you encounter an r² without a ½, or an r³ without a ⅔?
I have discovered that the top of a broiling pan -- the bit with the ripples and slots -- is the perfect place to perch a laptop that (stupidly) depends on cooling air from underneath. Turn the thing upside down, so it doesn't scratch the table when you put it down.