You know those large bells by the registers at Trader Joe’s?

The bells offer a shorthand for those who know the code.

“The bells are a kind of Trader Joe’s Morse code,” explains theTrader Joe’sFAQ.

Trader Joe’s

“One bell lets our Crew know when to open another register.

Two bells mean there are additional questions that need to be answered at the checkout.

Three bells call over a manager-bang out person.

Ship’s bell

And Three short bellstwo long bellsthree short bells… now we’re justplaying.”

Okay, but why bells?

The first TJ’s had a nautical theme.