But if a family is concerned, when you're actually trick-or-treating, if you watch your child go to someone's door, ring the bell, and the other family comes to the door and hands them candy, it's one way of knowing it's a safe and comfortable gift of the candy.

CNN: Kate Kelly: Halloween safety

You waited for the door-to-door salesmen to ring your bell.

FORBES: A Foot in the Door No More

If a bank can't spare anybody to work the doorway, says Marchese, "I tell branch managers to put a bell over the door and just have everybody on the teller line look up and say hello, " the way chefs do in small sushi restaurants.

FORBES: OutFront

If you hear things getting violent next door, you can ring the bell or call the doorman or the cops.

CNN: To stem violence against women, men must step up

It's dinga lingle lingle, I dingle your bell, yes, I knocka knock knock at your door.

NPR: The Klezmatics: 'Happy Joyous Hanukah'

Behind a locked metal door, I sat on a cracked, black toilet seat and let my bell bottom corduroys wrinkle around my ankles.

FORBES: On The Net, Junior High Never Ends

The Class of 1998 posed for its official picture on the Capitol steps in the morning before a day of closed-door orientation sessions that ranged from a general introduction to politics to logistical issue like the House bell system, how to vote and the layout of the sprawling Capitol Hill complex.

CNN: House welcomes its incoming frosh