Sunday, January 30, 2011

Operating System Characteristics Of Generation I - Generation V

History of Operating Systems

1. Generation I (1945-1955): Vacuum Tubes and Plugboard
§ Large Machinery § Composed of thousands of large-sized transistor § Operation of the machine is done by a plugboard that was designed by programmers § The problems solved in the form of successive approximations (eg sine table) § Using plong cards in mid-1950 to make the program

2. Generation II (1955-1965): Transistor and bacth system
§ Computers began to be produced for commercial purposes § Known for processing by the system bacth § facilitate operator tasks

3. Generation III (1965-1980): ICs and Multiprogramming

§ Used for designing integrated circuit hardware § Known multiprogramming who worked many jobs in one memory and the same time § Known time-sharing: provision of rations to opbusy CPU Idle § Known Spooling (simultaneous peripheral operation on-line), system-job queue for jobs to be done

4. Generation IV (1980-1990): PC
§ Using the LSI (large scale IC) § Programming refers to the user friendly (easy to use) § Known network operation system and distributed operating system

5. Generation V (1990 -): RISC, VLSI
§ Simplifying the instruction set § Development of processing speed through the VLSI (very large scale IC) A compressor each have a set of instructions Example: RISC Machines à RS-6000


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