Protocol droid

A protocol droid was a droid whose job was to aid sentients with their etiquette and relations with each other. They often dealt with event planning, etiquette, translation, and problem solving. Typically 1.7 meters tall, protocol droids came in many shapes and sizes, although most were humanoid in form. Notable models included Cybot Galactica's 3PO-series protocol droid and Arakyd Industries' RA-7.