"Ŝ", or "ŝ", is a consonant and letter in the Esperantoalphabet. Since each letter in Esperanto has a consistent sound, this letter is always pronounced the same; its sound is represented by [S] in SAMPA.
... Agency (CIA)
Defense Intelligence Agency (DIA)
Federal Bureau of Investigation (FBI)
National Security Agency (NSA)
Naval Security Group[?] (NSG)
Office of ...