| 摘要 |
PROBLEM TO BE SOLVED: To shorten the processing time of a method for expressing the information of a computer without requiring the enormous number of codes. SOLUTION: Information is expressed by using four different states of optical pulses, a state that no optical pulse appears for unit time is expressed as '0', a state that one pulse appears is expressed as '2', a state that two pulses appear is expressed as '3', and a state that three pulses appear is expressed as '4'. Thus data and a program can be expressed by quaternary numbers.
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