Income tax is a direct tax which is levied on the income of private individuals. Various income tax systems exist. Those range from a flat tax to an extensive progressive tax[?] system.
Taxes levied on the income of companies is called corporate tax[?].
... Agency (DIA)
Federal Bureau of Investigation (FBI)
National Security Agency (NSA)
Naval Security Group[?] (NSG)
Office of Strategic Services (OSS, forerunner of ...