MGLT - This stands for Modern Galatic Light Time. 
(1 MGLT equals approximately 13 Km/H)

RU - Ranadium Ulstance - This is not a linear unit - 
that is, you multiply it by the square of SBD - the shield constant

SBD - Shield Bicapsular Directrix - 
This is the rate at which the shields can recharge

TIE - Twin Ion Engine