Facebook is a social networking service launched as FaceMash in July 2003, but later changing to TheFacebook on February 4, 2004. It was founded by Mark Zuckerberg with his college roommate and fellow Harvard University student Eduardo Saverin.
WhatsApp Inc., was founded in 2009 by Brian Acton and Jan Koum, both former employees of Yahoo!.
Twitter was created in March 2006 by Jack Dorsey, Noah Glass, Biz Stone, and Evan Williams and launched in July of that year. The service rapidly gained worldwide popularity. In 2012, more than 100 million users posted 340 million tweets a day, and the service handled an average of 1.6 billion search queries per day.
Instagram was developed in San Francisco by Kevin Systrom and Mike Krieger. Systrom was working in marketing and started doing engineering at night to help him learn how to code. He created a prototype app of an idea he originally called Burbn, which allowed people to check-in where they are on their mobile web app
It was created by Kevin Systrom and Mike Krieger, and launched in October 2010 exclusively on iOS..
PHYSICS INVENTIONS
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INVENTION
|
INVENTOR
|
YEAR
|
Air Brake
|
George Westinghouse
|
1869
|
Air conditioner
|
Willis Carrier
|
1902
|
Air Pressure
|
Evangelista Torricelli/Gasparo Berti
|
1643
|
Airplane
|
Wright Brothers
|
1903
|
Ammeter
|
Friedrich Dexler
|
1884
|
Amplitude Modulation
|
Reginald Fessenden
|
mid-1870s
|
Anemometer
|
Leon Battista Alberti
|
1450
|
Anode Rays
|
Eugen Goldstein
|
1886
|
Atomic bomb
|
Robert Oppenheimer
|
1945
|
Atomic Nucleus
|
Ernest Rutherford
|
1911
|
Automobile
|
Karl Benz
|
1885/1886
|
Battery
|
Alessandro Volta
|
1800
|
Calorimeter
|
Antoine Lavoisier
|
1782-83
|
Camera
|
Nicéphore Niépce
|
1816
|
Carburetor
|
Enrico Bernardi
|
1882
|
Cathode Ray Tube
|
Karl Ferdinand Braun
|
1897
|
Celsius
|
Anders Celsius
|
1742
|
Cosmic Rays
|
Victor Hess
|
1912
|
Diesel Engine
|
Rudolf Diesel
|
1890
|
Dynamite
|
Alfred Nobel
|
1867
|
Dynamometer
|
Edme Regnier
|
1798
|
Electric Generator
|
Michael Faraday
|
1831-1832
|
Electric Light Bulb
|
Thomas Edison
|
1879
|
Electricity
|
Benjamin Franklin
|
—
|
Electromagnet
|
William Sturgeon
|
1825
|
Electromagnetic Induction
|
Michael Faraday
|
1831
|
Military Submarine
|
David Bushnell
|
1775
|
Fuel Cell
|
William Grove
|
1839
|
Galvanometer
|
Johann Schweigger
|
1820
|
Gamma Rays
|
Paul Villard
|
1898-1900
|
Gravity
|
Sir Isaac Newton
|
1687
|
Helicopter
|
Igor Sikorsky
|
1939
|
Hubble Space Telescope
|
Edwin Hubble
|
1990
|
Inclinometer
|
Captain William Abney
|
—
|
Induction Motor
|
Galileo Ferraris
|
1885
|
Jet Engine
|
Frank Whittle
|
1941
|
Kinetoscope
|
Thomas A. Edison and William Dickson
|
1891
|
Large Hadron Collider
|
CERN
|
2008
|
Laser
|
Theodore H. Maiman
|
1960
|
Laser Printer
|
Gary Starkweather
|
1971
|
LCD
|
ILIXCO
|
1971
|
LED
|
Nick Holonyak
|
1962
|
Machine Gun
|
Hiram Maxim
|
1884
|
Magnetic Tape
|
Fritz Pfleumer
|
—
|
Magnetometer
|
Sheldon Breiner
|
–
|
Mercury Thermometer
|
Daniel Gabriel Fahrenheit
|
1714
|
Microscope
|
Zacharias Janssen
|
1590
|
Mobile Phone
|
Martin Cooper
|
1973
|
Neon lamp
|
Georges Claude
|
1910
|
Nuclear Reactor
|
Enrico Fermi
|
1942
|
Printing Press
|
Johannes Gutenberg
|
—
|
Quantum mechanics
|
Werner Heisenberg, Max Born, and Pascual Jordan
|
1925
|
Radar
|
Sir Robert Watson-Watt
|
1935
|
Radio
|
Guglielmo Marconi
| |
Railway Engine
|
George Stephenson
|
1825
|
Refrigerator
|
Oliver Evans
|
1805
|
Rocket Engine
|
Robert H. Goddard
|
1926
|
Safety Elevator
|
Elisha Otis
|
1852
|
Seismograph
|
Chang Heng
|
132 A.D
|
Steam engine
|
Thomas Savery
|
1698
|
Steam Turbine
|
Charles Parson
|
1884
|
Submarine
|
Cornelius Drebbel
|
17th century
|
Telegraph
|
Samuel Morse
|
1830s and 1840s
|
Telephone
|
Antonio Meucci
|
1849
|
Telescope
|
Hans Lippershey
|
1608
|
Television
|
John Logie Baird/Philo Taylor Farnsworth
|
1927
|
Thermometer
|
Galileo Galilei
|
1593
|
Transformer
|
Ottó Bláthy, Miksa Déri, Károly Zipernowsky
|
1885
|
Transistor
|
John Bardeen, Walter Brattain, and William Shockley
|
1947
|
Typewriter
|
Christopher Latham Sholes
|
1878
|
Vernier Caliper
|
Pierre Vernier
|
1631
|
Video Games
|
Ralph Baer
|
1972
|
Watch
|
Abraham-Louis Perrelet
|
1770
|
Wave mechanics
|
Erwin Schrödinger
|
1926
|
CHEMISTRY INVENTIONS
| ||
INVENTION
|
INVENTOR
|
YEAR
|
Polythene
|
Eric Fawcett and Reginald Gibson
|
1933
|
Osmosis
|
Jean Antoine Nollet
|
1748
|
Electrons
|
J.J. Thomson
|
1897
|
Neutrons
|
James Chadwick
|
1932
|
Protons
|
Ernest Rutherford
|
1920
|
Inert Gases
|
Sir William Ramsay
|
1894-1898
|
Radioactivity
|
Henri Becquerel
|
1896
|
Periodic Table
|
Dmitri Mendeleev
|
1869
|
Oxygen
|
Joseph Priestley
|
1774
|
Hydrogen
|
Henry Cavendish
|
1766
|
Atoms
|
John Dalton
|
1803
|
Neon
|
Georges Claude
|
Around 1902
|
Acid
|
Albert Hofmann
|
1938
|
Ionic Bonds
|
Svante August Arrhenius
|
1884
|
Covalent Bonds
|
Gilbert Newton Lewis
|
1916
|
Aluminum
|
Charles Martin Hall and Paul L. T. Héroult
|
1886
|
Dynamite
|
Alfred Nobel
|
1867
|
pH meter
|
Arnold O. Beckman
|
1934
|
Polyvinyl Chloride
|
Eugen Baumann
|
1872
|
Synthetic Rubber
|
Fritz Hofmann
|
1909
|
Titanium
|
William Gregor
|
1791
|
Radium
|
Marie and Pierre Curie
|
1898
|
BIOLOGY INVENTIONS
| ||
INVENTION
|
INVENTOR
|
YEAR
|
5 kingdom classification
|
Robert H. Whittaker
|
1969
|
Allopathy
|
Samuel Hahnemann
|
1842
|
Amoeba
|
August Johann Rösel von Rosenhof
|
1755
|
Anesthesia
|
Thomas Green Morton
|
1846
|
Animal electricity
|
Luigi Galvani
|
—
|
Anthrax Vaccine
|
Louis Pasteur
|
1881
|
Aspirin
|
Felix Hoffman
|
1899
|
Automated DNA Sequencer
|
Lloyd M. Smith
|
1987
|
Bacteria
|
Antonie van Leeuwenhoek
|
1676
|
BCG Vaccine
|
Albert Calmette and Camille Guerin
|
1921
|
Binomial nomenclature
|
Carolus Linnaeus
|
1707
|
Blood Group
|
Karl Landsteiner
|
1900-1901
|
Calcium
|
Sir Humphry Davy
|
1808
|
Cancer
|
Hippocrates
|
—
|
Cell
|
Robert Hooke
|
1665
|
Cell Nucleus
|
Robert Brown
|
1831
|
Cell Theory
|
Theodor Schwann and Matthias Jakob Schleiden
|
1830
|
Chloroplast
|
Konstantin Mereschkowski
|
1905
|
Cholera Vaccine
|
Waldemar Haffkine
|
1892
|
Chromosomes
|
Karl Wilhelm von Nägeli
|
1842
|
CT scan
|
Godfrey Hounsfield & Allan Cormack
|
1972
|
DDT
|
Paul Hermann Müller
|
1939
|
DNA
|
Rosalind Franklin and Maurice Wilkins
|
—
|
DNA Fingerprinting
|
Dr. Alec Jeffreys
|
1984
|
DNA Structure
|
James Watson, Francis Crick, Maurice Wilkins and Rosalind Franklin
|
1962
|
ECG
|
Willem Einthoven
|
1903
|
Enzyme
|
Anselme Payen
|
1833
|
Heart transplantation
|
Christiaan Barnard, Norman Shumway and Richard Lower
| |
First test tube baby
|
Robert Edward and Patrick Steptoe
|
1978
|
Genetic code
|
Marshall Nirenberg and Heinrich J. Matthaei
|
1961
|
Genetic drift
|
Sewall Wright
|
1929
|
Heart Transplantation
|
Dr. Christiaan Barnard
|
1967
|
Hepatitis – B Vaccine
|
Pablo DT Valenzuela
|
1981
|
Hepatitis B Virus
|
Dr. Baruch Blumberg
|
1967
|
HIV
|
Luc Montagnier
|
1983
|
Homeopathy
|
Samuel Hahnemann
|
1796
|
Hormone
|
Wm. M. Bayliss and Ernest H. Starling
|
1902
|
Insulin
|
Frederick Banting and medical student Charles H. Best
|
1921
|
Jarvik-7 (first artificial heart)
|
Robert Koffler Jarvik
|
1982
|
Kidney Dialysis
|
Dr. Willem Kolff
|
1943
|
Magnetic Resonance Imaging (MRI)
|
Raymond Damadian
|
1977
|
Malaria Parasite
|
Charles Louis Alphonse Laveran
|
1880
|
Meiosis
|
Oscar Hertwig
|
1876
|
Microbes
|
Robert Hooke and Antoni van Leeuwenhoek
|
1665
|
Mitochondria
|
Carl Benda
|
1898
|
Mitosis
|
Walther Flemming
|
—
|
Mutations
|
Thomas Hunt Morgan and Lilian Vaughan Morgan
|
—
|
Nucleoplasm
|
van Beneden
|
—
|
Nucleus
|
Robert Brown
|
1875
|
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