Modem connection, signal, interference:
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Closes the CD / DVD tray, Opens, disc read
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Manual copy machine
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Interference, Modem connection, signal
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Laser printer
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Turn on, turn off the hard drive
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Old computer keyboard
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Environmental sounds, typewriter, Office work
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Turn on, turn off the old monitor
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Closes the CD / DVD tray, Opens
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Photocopy (photocopy)
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The USB flash drive is inserted, removed
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Disc read, CD / DVD drive
★★★★★