Old computer keyboard:
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Shutting, Turning on the computer, fan noise
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Computer mouse movement
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Hard disk, room noise, read, write
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Floppy disk reading
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Modem connection, signal, interference
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Computer interface, alarm
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Closing the laptop cover, Opening
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Old computer keyboard
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Turn on, turn off the old monitor
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Computer interface, signal read information
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Office work, general noise
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The USB flash drive is inserted, removed
★★★★★