Mon Prof Augmenté
From Gears to Microchips
Age 18 · Technology
Early calculators used hand-turned gears to do arithmetic, while later machines relied on thousands of vacuum tubes. Transistors and then microchips made computing smaller, faster, and far more reliable.
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In the picture
- A hand-cranked calculator: turning gears performs arithmetic step by step.
- A punched paper sheet: holes store instructions or numbers for a machine to read.
- A vacuum tube: an early electronic switch that glows and controls current in a large machine.
- A transistor: a small solid switch that replaces fragile vacuum tubes.
- A silicon microchip: many transistors built together on one tiny piece of silicon.
Examples
- A pocket calculator and a smartphone both perform arithmetic, but they use modern chips instead of gears or tubes.
- A laptop’s processor contains millions of transistors on a single silicon chip.
Key takeaways
- Mechanical calculators used gears; vacuum-tube computers used glowing tubes.
- Transistors and microchips made computers smaller, faster, and more reliable.
Quiz: From Gears to Microchips (Age 18)
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What did early mechanical calculators use to perform arithmetic?
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What was a vacuum tube in early large machines?
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How did transistors and microchips change computers?
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