Ps vs. Pd

Ps and Pd Definitions
Ps
Plural of p
Pd
The chemical symbol for palladium, an element of the platinum group of atomic number 46.
Ps
Alternative form of PS.
Pd
A silver-white metallic element of the platinum group that resembles platinum; occurs in some copper and nickel ores; does not tarnish at ordinary temperatures and is used (alloyed with gold) in jewelry
Ps
A note appended to a letter after the signature