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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
Drinking water is poured into a glass.
Water Fluoridation: Just the Facts
Cathedrale St.Jean in Lyon, France has a 14th-century astronomical clock that shows religious feast days till the year 2019; Perpetual Calendar
Ten Days That Vanished: The Switch to the Gregorian Calendar
Internet http://www blue screen. Hompepage blog 2009, history and society, media news television, crowd opinion protest, In the News 2009, breaking news
Who Invented the Internet?
Dancers at a Cinco de Mayo festival at the Mission District, San Francisco, California. (Photo dated 2019.) holidays
Is Cinco de Mayo Mexico's Independence Day?
Poker game. Card game. Royal Flush in poker. Hearts suit gambling
Poker Hands Ranked
King Cobra snake in Malaysia. (reptile)
9 of the World’s Deadliest Snakes
Figure 13: A Maxim machine gun, belt-fed and water-cooled, operated by German infantrymen, World War I.
7 Deadliest Weapons in History

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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