Who Invented The Barcoding?

The Americans Norman Joseph Woodland, born in the year 1921and Bernard Silver (1924-1963) reached together the inventing of the first barcode. Their first barcode system depended on the ultraviolet ink, that system had two disadvantages as it faded quickly and it was expensive. Later, they reached the second barcoding system was formed from lines with …

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Who Invented Phones?

In the year 1875, The English electric engineer Willoughby Smith (1828-1891) reached to the photoconductivity of the element selenium. Which led to the first photoelectric cells, as Smith discovered while using selenium in an experiment that the conductivity of the selenium decreases when illumunation is available. In the year 1876, Alexander Graham Bell (1847-1922) succeeded …

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Who Discovered Pencils?

Most of the pencils are made from graphite with clay, some pencils are made from charcoal, others are made from carbon, and there is also the colored pencils and grease pencils. Most of the mixture are covered with a wooden binder, while some are covered with plastic. The great advantage in the pencil, which caused …

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Most Famous Explorers

The Portuguese Prince Henry, the son of the king John 1 (1394-1460) was the first to found colonizations for the Portuguese Empire in the Azores in the year 1430. He was the first to try to explore a route around Africa. The Italian navigator, explorer and colonizer Christopher Columbus (1451-1506) made four voyages for the …

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Who Invented The Compass?

The magnetic compass determine the north, south, east and west directions using a magnet pointer. The north and south directions in the magnetic compass are parallel to the north and south directions of the earth. The magnetic compass was first invented by the ancient Chinese around 2000 years ago, it was used in geomancy and …

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