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calculator Hewlett-Packard's HP-35 calculator, released in 1972 Texas Instruments-Nspire
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The Apple II
10 Inventions That Changed Your World
Wolfgang Amadeus Mozart. Mozart rehearsing his 12th Mass with singer and musician. (Austrian composer. (Johann Chrysostom Wolfgang Amadeus Mozart)
7 Famous Child Prodigies
Discover
A human Inuit skull in a stone chambered cairn in Ilulissat in Greenland. These ancient graves are pre christian and are at least 2000
14 Tough Questions Answered
Super Typhoon Noru over the western tropical Pacific Ocean as observed by the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA Aqua satellite July 31 2017
What Is the Difference Between a Typhoon and a Super Typhoon?
Thanksgiving Turkey with all the sides
Why Do We Eat Turkey on Thanksgiving?
A Factory Interior, watercolor, pen and gray ink, graphite, and white goache on wove paper by unknown artist, c. 1871-91; in the Yale Center for British Art. Industrial Revolution England
Inventors and Inventions of the Industrial Revolution
The Cheshire Cat is a fictional cat from Lewis Carroll's Alice's Adventures in Wonderland. (Alice in Wonderland)
11 Banned Books Through Time
Close up of books. Stack of books, pile of books, literature, reading. Homepage 2010, arts and entertainment, history and society
12 Novels Considered the “Greatest Book Ever Written”
Santa Claus flying in his sleigh, christmas, reindeer
Was Santa Claus a Real Person?

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Hewlett-Packard's HP-35 calculator, released in 1972
Texas Instruments-Nspire
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Related Topics and References

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Key People

Blaise Pascal
Blaise Pascal
French philosopher and scientist
Jack Kilby
American engineer
William Hewlett photographed c. 1988
William Hewlett
American engineer
William Seward Burroughs
American inventor
Frank Stephen Baldwin
American inventor
Wilhelm Schickard
German astronomer, mathematician, and cartographer