Holography is a photographic process, best known for the 3-dimensional images.
Holograms are made using a laser and a light-sensitive material chemically similar to a
photographic emulsion.
Home Related
The history of the common inventions you find inside your home.
Home Security Related
The first home security system was patented on December 2, 1969.
Horseshoe
The origin of iron horseshoes and horseshoe nails.
Hot Dogs
The history of hot dogs.
Hovercraft
The hovercraft was invented by Christopher Cockerell in 1956.
HTML
The history of hypertext markup language (HTML) is a strange and interesting tale.
Hula Hoop
The hula hoop was re-invented by Richard Knerr and Arthur "Spud" Melin.
Hydrofoil Boats
In 1908, Hydrofoil Boats were co-invented by Alexander Graham Bell & Casey Baldwin.
Hydrogen Fuel Cells
Invented in 1839 by Sir William Grove, hydrogen fuel cells have now becoming the power
source for the 21st century. See Also - How hydrogen cells work
Hygrometer
A hygrometer is an instrument used to measure the moisture content or the humidity of
air or any gas.
Hyperbaric Oxygen Chambers
The history of hyperbaric oxygen chambers.
Hypodermic Needle or Syringe
What's the history behind this medical device.
IBM PC
From an "Acorn" grows a personal computer revolution. The historical invention of the
century.
Ice Cream
History of the world's best loved dessert - ice cream.
Ice Cube Trays
The first flexible stainless steel, all-metal ice tray was invented by Guy Tinkham in 1933.
Ice Hockey
The game of ice hockey we know today was first played in Montreal in 1875, according to
rules invented by a McGill student.
Ice Skates
The oldest pair of ice skates known date back to about 3000 B.C.
Iconoscope
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(Ron)
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