Opening, closing the laptop cover:
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Old computer keyboard
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Office work, general noise
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Laser printer
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Removed, The USB flash drive is inserted
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Repeatedly pressing a computer mouse
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Sound signal of a bios computer, bios
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Computer mouse click
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Signal, interference, Modem connection
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Double click computer mouse
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Turning on the laptop, fan noise, shutting
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Floppy disk reading
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Franking machine
★★★★★
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