Office work, typewriter, environmental sounds:
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Read, room noise, write, Hard disk
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Office work, typewriter, environmental sounds
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Computer keyboard
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Disc read, CD / DVD drive
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Closes the CD / DVD tray, disc read, Opens
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Bios, Sound signal of a bios computer
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Removed, The USB flash drive is inserted
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Repeatedly pressing a computer mouse
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Turn off the hard drive, Turn on
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Alarm, Computer interface
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Laser printer
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Closes the CD / DVD tray, Opens
★★★★★