The term 'Gentle Attention-Getters' can refer to a variety of different things, but in this case it is referring to the job description of TAPS (4 letters). TAPS stands for 'Tactical Air Control Party' and is a group of military personnel who are responsible for providing air traffic control services on the battlefield. They are also responsible for providing air support to ground forces and coordinating air strikes. They are known for their gentle attention-getting techniques, such as using hand signals and radio communication to direct aircraft.