Saturday, 23 July 2011

SECOND GENERATION-1956-1963

THE TRANSISTORS



The second generation of computers witnessed the vacuum tubes being replaced by transistors. The transistor was far superior to the vacuum tube, allowing computers to become smaller,faster,cheaper,energy-efficient and more reliable than their first-generation counter parts. The transistors also generated considerable heat that sometimes caused the computer to malfunction. But it was a vast improvement over the vacuum tube. Second-generation computers used punched cards for input and printouts for output.
    
     Second -generation computers moved form the used of machine language to assembly languages, which allowed programmers to specify instructions in words. High-level programming languages were also being developed at this time, such as early versions of COBOL and FORTRAN. The computers stored their instructions in their memory, which moved from a magnetic drum to magnetic core technology.

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