Old computer keyboard:
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Computer simulated laser
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Turn off the old monitor, Turn on
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Closes the CD / DVD tray, Opens, disc read
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Signal, Modem connection, interference
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Matrix printer
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Turn on, turn off the hard drive
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Floppy disk reading
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Repeatedly pressing a computer mouse
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Double click computer mouse
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Closes the CD / DVD tray, Opens
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Computer mouse movement
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Computer interface, alarm
★★★★★