A service number is an identification code used to identify a person within a large group.
He added figures which held no meaning for me but must have been an identification code.
It could be an identification code of some kind.
They were obviously nothing as simple as an identification code or a challenge.
It, too, has transmitted what appears to be an identification code.
But that means they also have different identification codes.
As you know, part of the identification code is in the video channels.
Within a few days, the company sends its toll-free number and a personal identification code.
They made no sound, and Smith knew he had exactly fifteen seconds to press in his personal identification code before the line went dead.
The two flights would carry a single flight number and only one airline's identification code.
