Television

The invention:

System that converts moving pictures and sounds
into electronic signals that can be broadcast at great distances.

The people behind the invention:

Vladimir Zworykin (1889-1982), a Soviet electronic engineer and
recipient of the National Medal of Science in 1967
Paul Gottlieb Nipkow (1860-1940), a German engineer and
inventor
Alan A. Campbell Swinton (1863-1930), a Scottish engineer and
Fellow of the Royal Society
Charles F. Jenkins (1867-1934), an American physicist, engineer,
and inventor

Telephone switching

The invention: 

The first completely automatic electronic system
for switching telephone calls.

The people behind the invention:

Almon B. Strowger (1839-1902), an American inventor
Charles Wilson Hoover, Jr. (1925- ), supervisor of memory
system development
Wallace Andrew Depp (1914- ), director of Electronic
Switching
Merton Brown Purvis (1923- ), designer of switching
matrices