The AMERICAN HERITAGE dictionary
FOURTH EDITION
.a Employment in work for another, esp. for
a government.b A government branch or
department and its employees.
The armed forces of a nation, or any branch thereof.
The occupation or duties of a servant.
Work done for others as an occupation.
Installation or repairs provided by a dealer or
manufacturer.
A set of dishes or utensils.
Sports
A serve.
IT
Windows
homo economicus
opportunity cost
sunk cost
grant
voluntary
X, Y
X
X
Y
Give
Y
X
Take
Give
Take
Take
Give
U
X
U
Y
=