Remember, 'tau' comes from the Greek alphabet, often encountered in academic or scientific contexts. In mathematical equations, 'tau' is used like pi to represent ratios involving circles.
Pro Tip 2/2
Scientific Usage
'Tau' in physics implies precision; don't confuse it with the everyday lowercase 't' for time. In discussing angular velocity, they symbolized it using 'tau' instead of 'T' to avoid confusion.