Opens, closes the CD / DVD tray, disc read:
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Input error sound, Pressing a keypad
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Shutting, Turning on the computer, fan noise
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Turn on, turn off the hard drive
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Office work, general noise
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Computer mouse movement
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Laser printer
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Matrix printer
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Computer keyboard
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Franking machine
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Read the, Insert the disk into the drive
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Signal read information, Computer interface
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Write, read, Hard disk, room noise
★★★★★