The summary is:
The text is a transcript of a video lecture on coding systems used in computers for data representation. The speaker explains the concepts of binary, BCD, ASCII and Unicode systems, and gives examples of how to convert numbers and characters between different bases and formats. The speaker also mentions some advantages and disadvantages of each system, and some applications of coding systems in digital devices. The speaker occasionally makes mistakes or pauses to correct himself, and sometimes asks the audience questions or feedback. The lecture ends with the speaker saying good night and bye.
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