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Charles Babbage
First built a mechanical computer. First known as programmable computer. He was an engineer. He also studies at Cambridge University. He started his ideas about computers around 1812. -
Ada Lovelace
She was English mathmatican and writer. She the first idea of Scientific Programming. Ada Lovelace was known as the World's first programmer. -
Period: to
Early History
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Period: to
1st generation "Vaccum Tubes"
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1st Generation "Vaccum Tubes"
Made to store memories.
Advantagtes: store memories
Disadvantages: Too big,expensive,and use lots of heat.
EX: UNIVAC,ENIAC -
2nd Generation "Transistors"
Faster, Cheaper, and Smaller
Input: Punched cards
Output: Printouts
Develop language and symbols
EX: IBM 1401 -
Period: to
2nd Generation "Transistors"
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3rd Generation "Integrated Circuits"
Increased the speed and skillfulness.
Input: Keyboard
Output:Monitor
Advantages:smaller size,less heat required, less failure
Disadvantage:need much of air conditioning.
Ex:IC -
Period: to
3rd Generation "Integrated Circuits"
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4th Generation "Microprofessors"
During 1971-present
Thousands of informations were stored in a single chip.
Input:keyboard,mouse
Output:monitor,printer
Advantages:small,linked to form networks, which became internet.
Disadvantages:required manufacturing
Ex: Apple -
Period: to
4th Generation "Microprofessors"
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Period: to
4th Generation "Microprofessors"
