This slide is going into detail of era of computing for each era
- 1st era Mainframe Computer
- 2nd era Personal Computer
- 3rd era Ubiquitous Computing
Mark Weiser is Chief Technologist of the Xerox Palo Alto Research Center. He is the first person that define ubiquitious computing at 1988AD. It is about computer that are around us in everyday life.
Ken Sakamura define the principle "Computing Everywhere" and he also developed TRON(The Real-time Operating System Nucleus)

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