Question

various an abbrevation

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Answer 1

It may consist of a group of letters, or words taken from the full version of the word or phrase; for example, the word abbreviation can itself be represented by the abbreviation abbr., abbrv., or abbrev.; NPO, for nil (or nothing) per (by) os (mouth) is an abbreviated medical instruction.

Answer 2

e.g. - You will often see the abbreviation e.g. before someone gives an example. It stands for exampli gratia, which means, "example given." etc - "Etc", often seen at the end of long lists, is short for etcetera, which means "and other things."