Opens, closes the CD / DVD tray:
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Modem connection, signal, interference
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Closes the CD / DVD tray, disc read, Opens
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Sound signal of a bios computer, bios
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Computer keyboard
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Manual copy machine
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Insert the disk into the drive, read the
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Floppy disk reading
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Turn on, turn off the old computer
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Laser printer
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Opens, closes the CD / DVD tray
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Franking machine
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Turn on, turn off the old monitor
★★★★★