Signal Service Company / Bell Laboratories / AT&T / Bell Labs / PCM Systems / Bell Telephone Laboratories / /
Country
Japan / United States / Australia / United Kingdom / /
IndustryTerm
stable standard telephone circuit / later search / transmission systems / fiberoptic systems / usual long distance telephone / communication systems / end product / telephone people / electronics / normal telephone links / distinctive telephone handset / secrecy systems / telephone system / /
Movie
Battle of Britain / /
NaturalFeature
Vernier channel / /
Organization
NSA / Pentagon / White House / Signal Corps / Patent Department / United States government / /
Person
Churchill / Roosevelt / K. Potter / Ralph L. Miller / McArthur / O.E. Buckley / /
Position
Captain / guard / member of this group / President / armed guard / high ranking General / General / /
Project X---The Beginning of the Digital Transmission Age There is an oft repeated saying that "Necessity is the mother of invention." This was certainly true of the independent invention of Pulse Code Modulation by the Bell