Mechanical cash registers have used a small service bell for over a century to signal that the drawer opened and a sale was recorded, long before electronic point-of-sale beeps replaced them. That familiar ring survived as a stock effect in cartoons, adverts and comedy sketches, then moved online as a short downloadable clip for soundboards and edits. It works in the same family as a generic ding sound effect used for notifications, but listeners read this one specifically as money, retail and a completed purchase, which keeps it popular for shopping and business jokes.