1900 – 2000
Put these 10 technologies in order:
Past to Present
Photocopier Radio Circuit
An earlier and less successful lie detector or
polygraph machine was invented by James
Mackenzie. Twenty years later, John Larson, a
University of California medical student, invented
the modern lie detector (polygraph) and has been
used in police interrogation and investigation since.
Superheterodyne Radio Circuit
Invented by Edwin Howard Armstrong. Today,
every radio and television set uses this invention.
John Logie Baird is remembered as being an
inventor of a mechanical television system. John
Logie Baird and American Clarence W. Hansell
patented the idea of using arrays of transparent rods
to transmit images for television and facsimiles
respectively. Baird's 30 line images were the first
demonstrations of television by reflected light rather
than back-lit silhouettes.
The process called Xerography was invented by American
law student Chester Carlson. Xerography became
commercially available by the Xerox Corporation.
Xerography comes from the Greek for "dry writing".
Carlson had a hard time finding investors in his new
invention. He was turned down by IBM and the U.S. Army
Signal Corps, it took him eight years to find an investor, the
Haloid Company which later became the Xerox
An early example of robot technology, Grey Walter's
"Machina Speculatrix" was recently restored to its working
glory after being lost for some years. Walter's "Machina"
were small robots that looked like turtles. The restored
cyber turtles are freewheeling and light-seeking creatures,
propelled by two small electric motors. They roam in any
direction with sensor-contacts to avoid obstacles. A
photoelectric cell mounted on the steering column helps
the turtles search and aim towards the light.
Digital modems developed from the need to transmit data
for North American air defense. Modems were used to
communicate data over the public switched telephone
network or PSTN. The first commercial modem was
manufactured - the Bell 103 by AT&T. The Bell 103 was also
the first modem with full-duplex transmission, frequency-
shift keying or FSK, and had a speed of 300 bits per second
or 300 bauds.
Jerry D. Merryman, who was selected as the project manager, came up
with the logic designs for the calculator in three days. Together, Kilby,
Merryman, and Van Tassel began work on the calculator. The three
filed for a U.S. patent for the world's first handheld calculator.
Although the machine did not go into actual production for three
years, the prototype had been made. The machine could add, subtract,
multiply and divide. There was some automatic decimal placement,
and input numbers could be as large as 12 digits. The machine's
dimensions were about 4¼ by 6¼ by 1¾ inches and it weighed about
Nolan Bushnell together with Ted Dabney, wrote the first
arcade game. It was called Computer Space, based on Steve
Russell's earlier game of Spacewar!. The arcade game Pong
was written and released by Nolan Bushnell (and
programmed by Al Alcorn) a year later. Nolan Bushnell and
Ted Dabney started Atari Computers that same year. Three
years later, Atari re-released Pong as a home video game.
Fuji introduced the disposable camera. We call them
disposables but the people who make these cameras
want you to know that they're committed to
recycling the parts, a message they've attempted to
convey by calling their products "single-use
Vannevar Bush first proposed the basics of hypertext
in 1945. Tim Berners-Lee invented the World Wide
Web, HTML (hypertext markup language), HTTP
(HyperText Transfer Protocol) and URLs (Universal
Resource Locators). Tim Berners-Lee was the
primary author of html, assisted by his colleagues at
CERN, an international scientific organization based
in Geneva, Switzerland.
Time to put the 10 technologies
in order:Past to Present
PONG 1902 Correct:
1918 10-8: Expert
Modem 7-6: Good job
3-1: You need
Superheterodyne Radio 1958
Circuit ITS 1015