What is the abbreviation for Traffic alert collision avoidance system?

Looking for the shorthand of Traffic alert collision avoidance system or how to abbreviate it? We have 6 shorthands for Traffic alert collision avoidance system.

TCAS — Traffic Alert and Collision Avoidance System
TCASII — Traffic Alert and Collision Avoidance System
TCAS-II — Traffic Alert And Collision Avoidance System
TCAS — Traffic Alert Collision Avoidance System
TACAS — Traffic Alert and Collision Avoidance System
TCAS — Traffic Alert and Collision and Avoidance System