I got a flu shot at Kaiser last month and noticed this sign in a hallway:
I couldn't remember previously seeing an "Annunciator" anywhere. I assumed it was a brand name like the fondly remembered Ticket Spitter. But no: it's a generic term. Merriam-Webster says an "annunciator" is "a usually electrically controlled signal board or indicator."
Still, can you blame me for expecting to hear a chorus of hosannas?