Important Computer Awareness Materials (Day-19) – History of Computer:
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History of Computer:
What is Computer?
An electronic device which is capable of receiving information (data) in a particular form and of performing a sequence of operations in accordance with a predetermined but variable set of procedural instructions (program) to produce a result in the form of information or signals.
What are Characteristics of Computer?
As you know computer can work very fast. It takes only few seconds for calculations that we take hours to complete. You will be surprised to know that computer can perform millions (1,000,000) of instructions and even more per second.
As computers work on inbuilt software programs, there is no scope for human errors and are hence, highly accurate.
- No IQ:-
Computer is a dumb machine and it cannot do any work without instruction from the user. It performs the instructions at tremendous speed and with accuracy. It is you to decide what you want to do and in what sequence. So a computer cannot take its own decision as you can.
A computer can store a large amount of data or instructions in its memory which can be retrieved at point of time.
- No Feelings:-
It does not have feelings or emotion, taste, knowledge and experience. Thus it does not get tired even after long hours of work. It does not distinguish between users.
- Father of Computer– CHARLES BABBAGE
- Father of Modern Computer Science– ALAN TURING
- First Un Programmable Digital Computer– ATANASOFF BERRY COMPUTER(ABC)
- First Electronic Digital Computer– ENIAC
- ENIVAC stands for– ELECTRONIC NUMERIC INTEGRATOR AND CALCULATOR
- World’s Fastest Computer- Sunway TaihuLight, in China.
- India’s Fastest Computer-Param Yuva II
- Param Yuva II developed by- Centre for Development of Advanced Computing (CDAC)
GENERATIONS OF COMPUTERS :
1). First Generation – (1940-56) – Vacuum tubes – Batch processing OS
2). Second Generation – (1956-63) – Transistors – Multi bag / Time sharing OS
3). Third Generation – (1964-71) – Integrated Circuits – Timesharing/ Real time OS
4). Fourth Generation – (1971-80) – Microprocessors – Real time/ Multi programming OS
5). Fifth Generation – (1980- present) – Semi conductors – Real time/ Multi programming OS
Languages according to Generations:-
1st – Machine and Assembly language
2nd – Assembly language and high level languages (FORTRAN, COBOL)
3rd – High level languages (FORTRAN II – IV, COBOL, PASCAL, BASIC, ALGOL68)
4th – High level languages (FORTAN 77, PASCAL, COBOL)
5th – High level languages(C, C++, JAVA, .NET)
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