The microwave oven was invented in 1946 but did not become popular until the late 1970s. By 1986, 60% of American households owned a microwave, which revolutionized food preparation by providing a fast and convenient heating method. While some have raised health concerns, microwaves have become a staple appliance due to their time-saving benefits.

1. JUAN SALVADOR LÓPEZ GUERRERO

2.  Although it was created in 1946 by Percy Spencer, an
engineer in the U.S., the microwave oven became
popular in the late seventies.
 In 1986, the microwave was present in 60 percent of
households gringos.
 Microwave ovens routine changed in the way of
cooking and heating food, and although some groups
have noted naturopathic health hazards assumptions
for its use, comfort and time saving microwave energy
have made him one of the favorite appliances.
JUAN SALVADOR LÓPEZ GUERRERO

3.  They are used in the waiting rooms of airports, on airplanes, in
offices, in universities.
 Mobility is its most precious. In April 1981 we launched the first
laptop: the Osborne 1.
 This computer, which bore the name of its creator, Adam Osborne-
English was very different to the current laptops. It weighed 11 kilos
and was rudimentary.
 But the success was immediate and in 1982 Osborne Computer
Company bill reached $ 10 million annually. 27 years after laptops
gain in capability while reducing weight and price.
JUAN SALVADOR LÓPEZ GUERRERO

4.  The compact disc (CD) was released a August 17, 1982
by the Dutch company Philips and works by a laser-
read without physical contact-information contained in
a record of 12.7 inches in diameter.
 The CD revolutionized the way we listen to music and
meant to other formats (cassette, vinyl record). The
first CDs were recorded the album The Visitors of the
Swedish group Abba and Richard Strauss' Alpine
Symphony under the direction of Herbert von Karajan.
 With the advent of mp3 and iPod sales have declined so
compact that predicts the death of the CD.
JUAN SALVADOR LÓPEZ GUERRERO

5.  Before 1998, the diskette was lord and master when storing
information. But CDs and USB flash drives (Universal Serial
Bus), snatched his reign.
 In 1998, IBM asked the Israeli company M Systems (later
acquired by Sandisk), the first line G USB for inkpad. They
came in 8, 16, 32 and 64 megs. Today's 64-gigabyte models
and different presentations (keychains, dolls, etc).
 Universities are a common sight in ads like this: "I lost on
Thursday November 22 Black scandisk USB memory of 4
gigs."
JUAN SALVADOR LÓPEZ GUERRERO

6.  Global Positioning System (Global Positioning
System) is a technology developed in the
seventies for military purposes by the U.S. Army.
Ivan Getting, a physicist and electrical engineer
was the inventor of this device indicating the
exact coordinates of latitude and longitude with
its satellite connection.
 Currently the GPS are in cars, trucks, planes,
boats or used by geologists in exploration work.
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7.  Flexible inflatable bag and cushioning the impact of a
vehicle occupant in case of collision.
 The airbag was patented in 1971 by the German
company Mercedes Benz.
 The first standard airbag was installed in a Mercedes S
Class 1981. Gradually its use has spread and for
example in Spain in 2007, one hundred per cent of new
cars were equipped with airbags.
JUAN SALVADOR LÓPEZ GUERRERO

8.  In the eighties and early nineties it was normal to see
a movie on Betamax or VHS became better life with the
advent of DVD (Digital Versatile Disc), which stored
large amount of information (4.7 gigabytes).
 The first DVD SD-3000 was made ​in November 1996 by
Toshiba.
 The DVD has changed the way movies: someone in the
comfort of your living room can see the special edition
of their favorite film with additional material (behind
the scenes footage, interviews).
 Without fulfilling even 12 years, Blu-Ray, for their
technical and storage (25 gigabytes), is emerging as
the replacement DVD.
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9.  The first cell created in Japan in 1979 were large and
only transmitted sounds. Today cell phones texting,
taking pictures, or music store.
 Like other inventions, the "cellular" marked changes in
people's lives. With this device we can communicate at
any time. Advantage has its cons:
 boss calls absurd hours (seven o'clock, nine of the
night), having to hear other people's conversations at
the office or cell phone ringers stand in restaurants,
theaters, cinemas, even funeral homes and churches.
JUAN SALVADOR LÓPEZ GUERRERO

10.  Hard to imagine what the world would no Internet.
 There would email, or Google, or YouTube videos,
or calls for Facebook, let alone Internet Day (May
17).
 There would be no chat rooms or blogs, or a
student may consult books without leaving home.
What in 1972 was a project scientist in the United
States, is now used by more than one billion
people.
JUAN SALVADOR LÓPEZ GUERRERO

11.  The recent marches of February 4 and March 6
were called by Facebook social network that
receives 5,000 million visits.
 Facebook was created in 2005 by a student at
Harvard University, led by Mark Zuckerberg
(1984). Yahoo tried to buy Facebook by 1,000
million dollars but Zuckerberg did not accept the
offer. And he was right.
 On October 24, 2007, Microsoft bought a 1.6
percent pay Facebook $ 240 million.
JUAN SALVADOR LÓPEZ GUERRERO

12. JUAN SALVADOR LÓPEZ GUERRERO