Matrix printer:
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General noise, Office work
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Laser printer
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Alarm, Computer interface
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Repeatedly pressing a computer mouse
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Floppy disk reading
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Franking machine
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Sound signal of a bios computer, bios
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Opens, closes the CD / DVD tray
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Write, room noise, Hard disk, read
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Turn on, turn off the old computer
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Disc read, CD / DVD drive
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Turning on the computer, fan noise, shutting
★★★★★