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Punched Card Calculator Patented
January 8, 1889 Herman Hollerith is issued a US patent for his punched card calculator. 7 years later he starts a company called the Tabulating Machine Company. In 1911, this is one of 4 companies that merge to form the company that will one day be called IBM. Punched Card Calculator Patented is original content of…
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First Handheld Scientific Calculator
January 4, 1972 Hewlett-Packard introduces the first handheld scientific calculator, the HP-35. The precision of the calculator was greater than most mainframe computers of its time. For such a technological achievement, the name of the calculator is simply derived from the fact that it has 35 buttons. I wonder if they had to use the…
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The First Transistor Calculator
October 7, 1954 IBM researchers modify an existing model 604 vacuum tube calculator to use transistors. This experiment didn’t shrink the desk-sized machine nor make it any faster, but it did use only 5% of the power the vacuum tube-based design did. Encouraged by this successful experiment, IBM introduced the first commercial transistor calculator 4…
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The First Transistor Calculator
October 7, 1954 IBM researchers modify an existing model 604 vacuum tube calculator to use transistors. This experiment didn’t shrink the desk-sized machine nor make it any faster, but it did use only 5% of the power the vacuum tube-based design did. Encouraged by this successful experiment, IBM introduced the first commercial transistor calculator 4…
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The First Transistor Calculator
October 7, 1954 IBM researchers modify an existing model 604 vacuum tube calculator to use transistors. This experiment didn’t shrink the desk-sized machine nor make it any faster, but it did use only 5% of the power the vacuum tube-based design did. Encouraged by this successful experiment, IBM introduced the first commercial transistor calculator 4…
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First Handheld Scientific Calculator
January 4, 1972 Hewlett-Packard introduces the first handheld scientific calculator, the HP-35. The precision of the calculator was greater than most mainframe computers of its time. For such a technological achievement, the name of the calculator is simply derived from the fact that it has 35 buttons. I wonder if they had to use the…
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First Handheld Scientific Calculator
January 4, 1972 Hewlett-Packard introduces the first handheld scientific calculator, the HP-35. The precision of the calculator was greater than most mainframe computers of its time. For such a technological achievement, the name of the calculator is simply derived from the fact that it has 35 buttons. I wonder if they had to use the…
-
First Handheld Scientific Calculator
January 4, 1972 Hewlett-Packard introduces the first handheld scientific calculator, the HP-35. The precision of the calculator was greater than most mainframe computers of its time. For such a technological achievement, the name of the calculator is simply derived from the fact that it has 35 buttons. I wonder if they had to use the…
-
The First Transistor Calculator
October 7, 1954 IBM researchers modify an existing model 604 vacuum tube calculator to use transistors. This experiment didn’t shrink the desk-sized machine nor make it any faster, but it did use only 5% of the power the vacuum tube-based design did. Encouraged by this successful experiment, IBM introduced the first commercial transistor calculator 4…