Analysis of information sources in references of the Wikipedia article "Tau" in English language version.
τ shear stress
τ time constant
τ, τ torque
A function τ(n) related to the divisor function σ(n), also sometimes called Ramanujan's tau function.
The Thue-Morse sequence, also called the Morse-Thue sequence or Prouhet-Thue-Morse sequence (Allouche and Cosnard 2000), is one of a number of related sequences of numbers obtained from the parities of the counts of 1's in the binary representation of the nonnegative integers.
The symbol also has a number of other different meanings in physics, for example the tau particle, tau neutrino, as a symbol for torque, etc.