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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
African Americans demonstrating for voting rights in front of the White House as police and others watch, March 12, 1965. One sign reads, "We demand the right to vote everywhere." Voting Rights Act, civil rights.
Timeline of the American Civil Rights Movement
Leonardo da Vinci (1452-1519), Italian Renaissance painter from Florence. Engraving by Cosomo Colombini (d. 1812) after a Leonardo self portrait. Ca. 1500.
10 Famous Artworks by Leonardo da Vinci
Rural Irish landscape, Sligo, Ireland.
Why Is Ireland Two Countries?
A mug shot taken by the regional Colombia control agency in Medellin
Pablo Escobar: 8 Interesting Facts About the King of Cocaine
Hindu Holi Festival celebrations with colored water, powder and colorful flower petals thrown over celebrants at a Hindu temple in Mathura, Uttar Pradesh, India on March 24, 2021.
Holi: Festival of Colors
An ancient egyptian hieroglyphic painted carving showing the falcon headed god Horus seated on a throne and holding a golden fly whisk. Before him are the Pharoah Seti and the goddess Isis. Interior wall of the temple to Osiris at Abydos, Egypt.
11 Egyptian Gods and Goddesses
World Data Locator Map: Australia
Is Australia an Island?

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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