In the summer of 1992, or thereabouts, there was started a register of the names of fellow individuals. They were greeted with a "bing", and their name was requested if they had not previously given their name. Then each time they returned to the immediate line of vision and conversation of TD and DE, they were once more greeted with that memorable audible salutation: "bing!".
It was at a later date that the sequel, "The beep register" was designed and created. This was a computer version of the previous register, and was not quite as great a success as the bing register, mainly because it could be described as a pile of poo, and often is. (Not that the bing register was any good in the slightest.)