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old computers used punched cards to work.
Charles Babbage invented the first calculator.
Ada Lovelace wrote the first computer program.
Herman Hollerith invented the way of using punched cards and his own company which developed later to IBM.
Vannevar Bush invented the first mechanical computer which was known as differential analyzer.
Alan Turing machine could solve any type of equation.
z3 was the first digital computer.
---------------------------------------------------------------------------------------------------what is a computer
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computer is an electronic device that uses binary language which is 0,1
computers do arithmetic and logical operations.
Analog computers process analog data. Temperature, pressure, weight, depth, and voltage are a few examples of this type of data.
Computers that combine digital and analog components are called hybrid computers. It combines the best features of both types, having the speed of an analog computer with the memory and precision of a digital computer.
INPUT-->PROCESS-->OUTPUT.
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computer storage:
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primary storage like RAM and ROM
RAM is temporary storage while ROM is Permanent storage.
Your computer uses ROM to remember how to start the operating system.
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secondary memory is the computer's long-term memory. It stores information even when the computer is off it has more space than primary memory.
Secondary memory uses things like hard drives, CDs, DVDs, and flash drives to store information.
----------------------------------------------------------------------------------------------------software
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non touchable like os and applications.
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computer types
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Personal Computers (PC)
Server Computers
Mainframe Computers
Supercomputers
Tablets and Smartphones
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