The oldest -OTUS ("of the United States") acronym is SCOTUS ("Supreme Court of the United States"), in use since the 1870s. POTUS ("President of the United States") is the second oldest, coming some twenty years after SCOTUS. FLOTUS ("First Lady of the United States") is another, thought to have originated in the 1980s. Less common than these, but still occasionally found, is VPOTUS ("Vice President of the United States").