TAC' TAC is an acronym for the phrase 'Tactics, Techniques, and Procedures'. It is a term used in the military and other organizations to refer to the specific methods used to achieve a goal. TAC is often used to describe the strategies and tactics used in combat, but it can also be used to refer to the procedures used in any type of organization. TAC is an important part of any organization's operations, as it helps to ensure that all members are working together towards a common goal.