Office work, general noise:
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Opens, closes the CD / DVD tray
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Closes the CD / DVD tray, disc read, Opens
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Input error sound, Pressing a keypad
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Photocopy (photocopy)
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Closing the laptop cover, Opening
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Floppy disk reading
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Signal read information, Computer interface
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Matrix printer
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Jet printer
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Interference, Modem connection, signal
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Computer mouse movement
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Turn on, turn off the hard drive
★★★★★