Generations of computer

First Generation:-The first generation of computers the time period is 1951-1958.The main component is used Vaccum tubes.The storing device is Vaccum tubes and electro static tubes.The remarks of it is very expensive failure rate was very high.Ex.ENIAC
Second Generation:-The second generation of computers the time period is 1959-1964.The main component is used Transistors.The storing device is magnetic drums.It is mainly used for Business applications.Ex.EDSAC(Electrical delay storage computer machine).
Third Generation:-The third generation of computers the time period is 1965-1970.The main component is used Integrated Circuit.The storing devise is magnetic tapes.The remarks first of used high level languages COBAL,FORTRAN.COBAL means Common Business Oriented Language,FORTRAN means Formula translated language and PL means Programming language.Ex.IBM(International Business Machine).
Fourth Generation:-The fourth generation of computers the time period is 1970-1980.The main component is used VLSI(Very Large Scale Integrated circuits).The storing device is Flophy Disks.The features of fourth generation are
1.Reduction size 2.Micro processor used 3.Better price
Fifth Generation:the fifth generation of computers the time period is 1981 onwards.The main cponent is used Think centre or it is called thinking computers.The storingdevice is CD ROM.RThe features of fifth generation are
1.Reduction size 2.Micro processor used 3.Better price.