11. The designated shooter can be identified by palm or fingerprint, numerical code , swipe card or voice recognition. 12. Defensive formations are often known by a numerical code indicating the number of players at each position. 13. These devices give owners special keys with tiny transmitters that send a numerical code that constantly changes. 14. His little book, " Pager Power, " provides 11, 000 numerical codes that represent words or phrases. 15. Because numerical coding represents the sound waves perfectly, the sound can be played back without background noise. 16. In " L?ch S? ", teams had to use a series of numerical codes to reveal a passphrase. 17. Ordinary traffic signs alternate with others in numerical codes , marking exits open only to drivers with security clearances. 18. For instance, the system could be configured so users would have to enter unique numerical codes before selecting floors. 19. The keys are distributed to as many as twenty-one people and the numerical code is distributed to another twenty-one people. 20. She designed a numerical code , which corresponded to the members of Groep 2000, the people in hiding and all addresses.
