In the world of Science,
V is the volume,
Z is the partition function,
P and Q are the position and momentum of a particle.
R is the gas constant,
and T is temperature.
W is the number of states,
and we have to keep X and Y in case
we need more variables…
Going back to the first half of the alphabet:
A, F, and G are for free energies,
B is a magnetic field.
I is the symbol for information;
J and L are angular momenta.
K is Kelvin, which is the proper unit of T.
M is magnetization,
and N is total number of elements,
O is too easily confused with 0….
This leaves S, and H.
S is for Sets..
Thus, H is for Entropy !!
by Rieke, et al. from the book “spikes” with little variation