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computer fundamental and organization information technology computer input output device output device input device cfo printer keyboard mouse crt microsoft omr ocr memory cell memory organization computer basics basics of computer computer engineering software engineering how computer works history of computer old computer structure of instruction flip flop shift registers – parallel in parallel out shift registers – parallel in serial out shift registers – serial in parallel out counters & registers shift registers – serial in serial out shift register binary ripple counter synchronous counter ripple counter what is counter? d-flip flop t flip flop master slave flip flop j-k flip flop clocked state active high state active low state r-s/s-r flip flop sequential circuit risc and cisc processor to memory communication interconnection unit description of processor