Vacuum Tube: An electronic device invented by Thomas Edison used for amplification and switching in early electronic devices, including computers. It controls the flow of electrical current through a vacuum within a glass tube.
Stored-Program Concept: An innovation where both data and instructions are stored in a computer’s memory, allowing for easier programming, flexibility, and the ability to repeat instructions without rewiring the machine.
ENIAC (Electronic Numerical Integrator and Computer): The first programmable digital computer, developed during WWII to calculate missile trajectories, and completed in 1946. It was significantly faster than previous calculators.
First Generation Computers: Computers that used vacuum tubes for circuitry, magnetic drums for memory, and relied on machine language. They were large, expensive, heat-generating, and slow to reprogram.
Transistor: A semiconductor device replacing vacuum tubes in second-generation computers, making machines smaller, faster, more reliable, and energy-efficient.
1. What are vacuum tube computers primarily known for?
2. What is a key fact about the significance of the stored-program concept in computing history?
3. What was the primary purpose of the technological advancements in each computer generation?
First computers — size?
Large, room-sized.
First computers — input method?
Punched cards and paper tape.
Stored-program — benefit?
Flexibility and automation.
Impact of transistors — on size?
Made computers smaller and more efficient.
Computer generations — basis?
Technological advancements over time.
ENIAC — significance?
First programmable digital computer.
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