Psi

Psi was a letter in the Tionese alphabet. Psi was often used as a call sign for Imperial starfighter Flight groups, specifically Assault Gunboats. Assault Gunboat designated Psi 2 is one such example.
==Appearances==
*Star Wars: X-Wing 
*Star Wars: TIE Fighter
*Star Wars: X-Wing Alliance
*Star Wars: X-Wing vs. TIE Fighter
Category:Writing