This tag is for questions on the meaning, history, and usage of various symbols and notation that are used to denote different quantities in physics. Don't forget to mention the reference, where you encountered those notations.
In Physics, various symbols or notations are used to denote different quantities. The denotations make the representation of the quantities easier. It is interesting to note that some physics symbols are very relatable (like “d” for distance) while some are unrelatable (like “c” for the speed of light). To get better response, please remember to mention where (book, paper, webpage, etc.) from where you encountered those.