Different Generations of Operating System OS
1940’s (First Generation) :- programming languages were unknown; earlies electronic digital computers had no OS.
1950’s (Second Generation):- Introduction of punch cards; first OS is IBM 701 which runs one job at a time.
1960’s (Third Generation):- concept of multiprogramming in which several jobs are in memory at once and the processor is switched from job to job as needed; time sharing technique in which each user has an on-line terminal and the computer system responds quickly to user requests.
1950’s (Second Generation):- Introduction of punch cards; first OS is IBM 701 which runs one job at a time.
1960’s (Third Generation):- concept of multiprogramming in which several jobs are in memory at once and the processor is switched from job to job as needed; time sharing technique in which each user has an on-line terminal and the computer system responds quickly to user requests.
From 1970’s (Fourth Generation):- development of LSI(large scale integration) circuits, chips, OS; personal computer and workstation age; multiprocessor technology evolved; DOS and UNIX were dominated OS .
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