1.   For instance, the system could be configured so users would have to enter unique numerical codes before selecting floors.

2.   He has sent the FBI a numerical code, which permits agents to determine the authenticity of his letters and ignore copycats.

3.   IANA, in turn, assigns numerical codes that correspond to all addresses.

4.   The numerical codes, or unique identifiers, recommended by the task force would be similar to those now used in HIV reporting systems in Maryland and Texas.

5.   The system also cuts down on fraud because users have to type in a numerical code before they can make a purchase, he said.

6.   These devices give owners special keys with tiny transmitters that send a numerical code that constantly changes.

7.   They convert sound to an electrical signal, and then to a digital signal, a numerical code that represents the intensities and frequencies of the original sound.

8.   When users dialed his pager, they punched in their telephone numbers before adding a numerical code to identify themselves to Jason.

9.   A face in a digital picture is converted into a numerical code that can be quickly compared with the faces in a database of thousands.

10.   It focuses on the eyes and translates the image of a face into a numerical code that is then compared against other faces.