Protocol droid

"I'm not much more than an interpreter, and not very good at telling stories."

- C-3PO

A protocol droid was a droid whose job was to aid sentients with their etiquette and relations with each other in the galaxy. Typically 1.7 meters tall, protocol droids came in many shapes and sizes, although most were humanoid in form. A notable model was Cybot Galactica's 3PO unit.